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Brie Larson's stage-name inspiration? Her favorite American Girl doll

Brie Larson already nabbed a Golden Globe, Critics' Choice award, BAFTA and SAG honor for her performance in the harrowing film "Room." And her Oscar buzz couldn't be bigger.

But did you know that long before she made a name for herself on screen, her name wasn't even Larson?

MARIO ANZUONI / Reuters
Actress Brie Larson arrives at the 73rd Golden Globe Awards in Beverly Hills, California January 10, 2016. REUTERS/Mario Anzuoni

The moniker is just a stage name, and we absolutely love the story behind it!

A new video on People.com notes that before launching her career at age 9, the star-to-be decided to take the name of her favorite American Girl doll.

YAS QUEEN #tbt

A post shared by Brie (@brielarson) on

It's a tidbit Larson first shared with Jimmy Fallon back in October — but with so many great moments from that visit, we somehow missed this one at the time!

RELATED: 'Room' star Jacob Tremblay strikes a pose, imitates Brie Larson's Elle cover

"Her last name is Larson," the actress said, gesturing to the Throwback Thursday Instagram photo above. "The doll is an American [Girl] doll, Kirsten Larson, and my last name is French and very hard to say."

Larson's given name is Brianne Desaulniers, but even as a child she'd grown tired of hearing others mispronounce it.

"I was sick of it, and as a result I'm, like, 'I'm changing my name!" she recalled. "I'm changing it to Larson, so Kirsten can be in our family.'"

And that? Could not be cuter.

  • Slideshow Photos

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    Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

    Brie Larson got her start in Hollywood at just 9 years old. See the Oscar-nominated actress' journey to becoming a red carpet regular.

  • Day Of The Child

    Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

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    2001

    Even as a young star, Brie Larson was ready to make a statement in the fashion world. She rocked this peach-colored fur coat to the "International Day of the Child" benefit. 

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  • Brie Larson At The Film Premiere of Santa Claus 2

    Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

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    2002

    Living the teenage dream! Larson strutted down the red carpet in white pants and a strapless, biased-cut top for "The Santa Clause 2" premiere.

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  • Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

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    2003

    Channeling her inner cheerleader, Larson hit the red carpet for the world premiere of "Dr. Seuss' The Cat In The Hat" in a varsity jacket, cheer skirt and cool converse kicks.

    AP
  • 2004 Teen Choice Awards - Arrivals

    Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

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    2004

    Looking quite sophisticated for a young starlet, Larson accessorized her outfit for the 2004 Teen Choice Awards with a bright green headband and crocheted bag. 

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  • Los Angeles Premiere Of Dreamwork's "Europtrip" - Arrivals

    Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

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    2004

    Larson took a style note from "Grease" at the premiere of "Eurotrip." Believe it or not, her slip-on shoes were all the rage back in the early aughts. 

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  • ELLEGIRL's First Annual Hollywood Prom

    Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

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    2005

    Larson channeled her inner Cinderella in this blue party dress, which she wore to the First Annual ELLEGirl Hollywood prom party. All that was missing were her glass slippers!

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  • Joanna Schlip Launches The J-Gurlz Fund - Arrivals

    Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

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    2006

    It's all about the accessories! A pink beanie, vintage-style bag, peach pumps and a bold white belt made Brie Larson's outfit seem anything, but boring.

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  • Kira Plastinina Hosts Her U.S. Launch Party - Arrivals

    Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

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    2008

    Larson totally rocked these denim shorts for designer Kira Plastinina's launch party. A tuxedo-inspired shirt and bright yellow pumps dressed up this casual look. 

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  • Brie Larson

    Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

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    2009

    Larson looked radiant in this number at a Showtime party in 2009. The Peter Pan collar and embellished flowers gave this black dress some personality. Plus, the pink shoes added just the right pop of color.

    AP
  • Premiere Of Showtime's "United States Of Tara" - Arrivals

    Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

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    2009

    Larson rocked this bright hue at the premiere of the Showtime series "United States of Tara." With such a high-necked dress, her sleek updo let the outfit shine. 

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  • CBS, CW, CBS Television Studios & Showtime TCA Party - Arrivals

    Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

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    2009

    Larson's pants-and-blouse combo got a modern update thanks to some menswear-inspired suspenders. 

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  • Vanity Fair And Dior Host Kimberly Brooks' "The Stylist Project" Exhibition

    Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

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    2010

    With a dress that fabulous, who needs accessories? Larson's coral number stole the show at a style exhibition. 

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  • Premiere Of Focus Features' "Greenberg" - Arrivals

    Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

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    2010

    Embroidered flowers made this white dress one to remember. Larson wore this girly number (with a cute braid, too boot!) for the "Greenberg" premiere in Los Angeles.

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  • Scott Pilgrim Vs The World - European Film Premiere - Arrivals

    Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

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    2010

    Red, white and blue for the win! Larson rocked a feather-y skirt and funky top at the "Scott Pilgrim vs The World'" European premiere.

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  • ELLE Women In Television Event - Red Carpet

    Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

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    2011

    With knee-high black boots, a sexy dress and tousled curly hair, Larson was ready to party. She wore this combo to the ELLE Women in Television event in 2011.

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  • 9th Annual Teen Vogue's Young Hollywood Party

    Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

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    2011

    The star had some fun with this silver dress by pairing it with eccentric, leopard print lace-up booties for the annual Teen Vogue's Young Hollywood party.

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  • AFI FEST 2011 Presented By Audi - "Rampart" Special Screening - Arrivals

    Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

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    2011

    Larson made a cozy cape feel suddenly red carpet appropriate thanks to heels and a bright red lip. The tan leather pockets and red trim didn't hurt one bit. 

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  • 16th Annual GQ "Men Of The Year" Party - Arrivals

    Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

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    2011

    Knee-high socks and oxford shoes don't typically make a red carpet appearance, but Larson nailed this school-girl inspired look. Her bold blue mini and scarf made a statement at the GQ's annual Men of the Year party. 

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  • Audi Presents The Art of Elysium's 5th annual HEAVEN - Red Carpet

    Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

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    2012

    Larson looks just heavenly in a vintage-inspired light blue dress. Her sparkly shoes and bejeweled headband added an extra touch of glitz. 

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  • Premiere Of Columbia Pictures' "21 Jump Street" - Arrivals

    Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

    of

    2012

    It was all about the shoes for Larson at the "21 Jump Street" premiere. She accessorized her girly blue dress with peep-toe pumps in a fun floral print.

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  • 2012 MTV Movie Awards - Red Carpet

    Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

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    2012

    A glittery top made Larson's white dress stand out at the 2012 MTV Movie Awards. She kept her accessories to a minimum, letting her Funfetti-like outfit sparkle. 

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  • The Art Of Elysium's 6th Annual Black-tie Gala "Heaven" - Arrivals

    Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

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    2013

    Larson looked like a green goddess in this skintight emerald dress at a black-tie gala. This gorgeous hue really popped against her auburn locks. 

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  • Celebrities Visit SiriusXM Studios - August 15, 2013

    Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

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    2013

    Larson was a lady in blue in this leather sheath dress. She wore this office-chic look for a visit to the SiriusXM Studios.

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  • AFI FEST 2013 Presented By Audi Presents The Los Angeles Times Young Hollywood Roundtable - Arrivals

    Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

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    2013

    Looking fresh-faced and beautiful, Larson glowed in this white dress at The Los Angeles Times Young Hollywood Roundtable. 

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  • 19th Annual Critics' Choice Movie Awards - Arrivals

    Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

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    2014

    Larson made a statement on the red carpet in a floral-printed dress at the Critics' Choice Movie Awards. Her "no-makeup" makeup helped make this look a red carpet winner.

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  • 2014 Film Independent Spirit Awards - Arrivals

    Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

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    2014

    Larson looked chic and stylish in this minimalist dress and ponytail at the Film Independent Spirit Awards. Her nude pumps and gold accessories add just the right amount of pizzazz.

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  • "Charles James: Beyond Fashion" Costume Institute Gala - Arrivals

    Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

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    2014

    Larson had a major fashionista moment on the red carpet of the Met Gala. The actress was bedazzled from head-to-toe and topped it off with a funky hairdo at the fashion-forward event. 

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  • ELLE's 21st Annual Women In Hollywood Celebration - Arrivals

    Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

    of

    2014

    Sleek sophistication was the name of the game for Larson at ELLE magazine's Women in Hollywood celebration.

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  • Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

    of

    2015

    A funky sweater created a casual style moment for the actress. 

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  • Coach - Presentation - Mercedes-Benz Fashion Week Fall 2015

    Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

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    2015

    Nailing it! Larson's utilitarian dress looked cool at the Coach presentation during New York Fashion Week. The orange bag added the perfect pop of color. 

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  • Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

    of

    2015

    Larson looked ready to be swept away by Prince Charming in this stunning, sparkly black ballgown. Her retro bob and nude lip helped create a major fashion moment at the 2015 Vanity Fair Oscar Party. 

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  • Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

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    2015

    Larson went all out for the Met Gala in 2015. Major jewels and a bedazzled headband made it hard to miss this stylish star. 

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  • 2015 Toronto International Film Festival - "Room" Premiere

    Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

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    2015

    Larson's faux-hawk gave this one-shoulder purple dress an edgy twist at 2015 Toronto International Film Festival. Her black-and-white pumps were an unexpectedly trendy choice. 

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  • "Room" - Red Carpet - BFI London Film Festival

    Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

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    2015

    Larson looked absolutely radiant in this nude mini dress. Her slicked back hair let the intricate pattern rule the red carpet at a screening of "Room" during the BFI London Film Festival.

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  • 2015 National Board Of Review Gala

    Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

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    2016

    The unique mix of patterns, colors and textures somehow work perfectly on this playful dress. Simple pumps and natural-looking makeup polished off the look.

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  • W Magazine Celebrates The 'Best Performances' Portfolio And The Golden Globes With Audi And Dom Perignon - Arrivals

    Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

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    2016

    Delicate jewelry and a statement lip made Larson's menswear-inspired outfit feel feminine. 

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  • BAFTA Los Angeles Awards Season Tea - Arrivals

    Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

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    2016

    Fringe is in! Larson had some fun by going for a fringe-covered skirt at the BAFTA Los Angeles Awards Season tea. 

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  • Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

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    2016

    In a look that is possibly one of Larson's best ever, the Golden Globe-winner rocked a shimmery, cutout column gown with smooth hair and understated earrings.

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  • Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

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    2016

    The high-slit, cutouts and draping on Larson's baby blue dress made it a true showstopper and gave the actress a grand entrance at the Screen Actors Guild Awards. 

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  • Brie Larson's fashion evolution: From a cute kid actress to a red carpet star

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    2016

    Talk about adding a wink and a nod to your wardrobe! Larson looks prim and proper, yet playful in a midi skirt patterned with winking eyes at the Academy Awards nominee luncheon. 

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RELATED: Brie Larson reacts minutes after Oscar nomination for 'Room' on TODAY Show

But while there's nothing controversial about her chosen screen name, some of her followers on Instagram took exception to her claim that the doll pictured is actually a real Kirsten Larson.

As one dolly detractor noted, "I have the Kirsten Larson AG doll....that's not it."

We say why nitpick what might just be the sweetest screen-name story we've ever heard? That little Larson was real enough for a real star.

Follow Ree Hines on Twitter.

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