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Macaulay Culkin reminds us he's 40 — yes, 40

We also took the liberty of making a list of other celebs that are 40, just for good measure.
Hard to believe but Macaulay Culkin turned 40 this week!
Hard to believe but Macaulay Culkin turned 40 this week!Kevin Mazur / Getty Images for dcp/Alamy
/ Source: TODAY

As if there weren't enough things to worry about going on in the world right now, actor Macaulay Culkin decided to make us all feel ancient with a tweet.

The famous "Home Alone" actor who portrayed little Kevin McCallister — ahem, a child in our hearts and minds forever — took to Twitter to be a real Debbie Downer.

"Hey guys, wanna feel old?" he wrote. "I'm 40. You're welcome."

Culkin was 10 years old when the first "Home Alone" movie came out in 1990... He turned 40 on Wednesday.

Culkin sent out another sorry-not-sorry tweet later.

"It's my gift to the world: I make people feel old," he quipped. "I'm no longer a kid, that's my job."

"Thanks a lot, f---er," Kathy Griffin replied.

"Nursing home alone," YouTube star DashieXP tweeted.

"Can’t wait to watch the wheelchair chase scene with Kevin, Marv and Harry," another user, @ADAMATION, quipped.

Culkin added he's planning on learning a new hobby as he enters this next decade.

"Since I'm 40 I think it's about time to start my midlife crisis," he posted. "I'm thinking of picking up surfing. Do you all have any suggestions?"

Below are several other celebs that are 40 years old!

Channing Tatum

Channing Tatum
Channing TatumShutterstock

Despite getting his start playing high school students in "Step Up" and "She's the Man," Tatum is now a casual 40 years old. He also has a 7-year-old daughter, Everly, with his ex-wife Jenna Dewan.

John Krasinski

"A Quiet Place Part II" World Premiere
John Krasinski at the "A Quiet Place Part II" premiere in New York City in March.Mike Coppola / Getty Images

It seems like just yesterday that Krasinski was playing a scrappy Jim Halpert and working at Dunder Mifflin, but that was actually 2005 to 2013. Now he's a father of two and starring in Amazon's "Jack Ryan."

Wilmer Valderrama

Premiere Of Disney And Pixar's "Onward" - Arrivals
Wilmer Valderrama at the premiere of Disney and Pixar's "Onward" on Feb. 18, 2020 in Hollywood, California.Gregg DeGuire / FilmMagic

Valderrama is best known for playing teenage exchange student Fez on "That 70's Show" from 1998-2006. He's still acting and is on "NCIS" as Special Agent Nicholas Torres. He also got engaged this year!

Adam Brody

LA Screening Of Fox Searchlight's "Ready Or Not" - Arrivals
Adam Brody at the Los Angeles screening of "Ready Or Not" in Culver City, California, on Aug. 19, 2019.Jon Kopaloff / Getty Images,

You might remember Brody from his role as Seth Cohen in the mid-2000s TV series, "The O.C." He too is 40 now.

Zooey Deschanel

Premiere Of Focus Features' "Emma." - Arrivals
Zooey Deschanel at the premiere of "Emma" on Feb. 18, 2020 in Los Angeles.Rodin Eckenroth / WireImage

It's hard to believe that "New Girl" star Zooey Deschanel is 40.

Olivia Munn

Love Leo Rescue's 2nd Annual Cocktails For A Cause
Olivia Munn at a Los Angeles charity event on Nov. 06, 2019.Presley Ann / Getty Images

Olivia Munn used to be a correspondent on "The Daily Show" when she was 30 and starred as Sloan Sabbith in Aaron Sorkin's "The Newsroom." We're pretty sure she hasn't aged in the last decade!

Rebel Wilson

2020 Vanity Fair Oscar Party Hosted By Radhika Jones - Roaming Arrivals
Rebel Wilson at the 2020 Vanity Fair Oscar Party on February 09, 2020 in Beverly Hills, California.Rich Fury/VF20 / Getty Images for Vanity Fair

Rebel Wilson played a college student in "Pitch Perfect" in 2012 but she turned 40 on March 2 this year.

Ellie Kemper

70th Emmy Awards - Arrivals
Ellie Kemper at the 70th Emmy Awards on Sept. 17, 2018 in Los Angeles.Matt Winkelmeyer / Getty Images

Ellie Kemper is also an alum of "The Office," portraying doe-eyed receptionist Erin Hannon from 2009-2013. Most recently, she has starred in "Unbreakable Kimmy Schmidt" as the titular character.

Kristen Bell

Celebrities Visit Build - February 21, 2020
Kristen Bell promotes her product line Hello Bello at an event on Feb. 21, 2020 in New York City.Jim Spellman / Getty Images

"Veronica Mars" herself! Since getting her start in 2004 as a private investigator/high school student in the show, Kristen Bell has been super busy over the past 15 years or so — from playing the lead in "The Good Place" to voicing Princess Ana in "Frozen" to having two kids with husband Dax Shepard.