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/ Source: TODAY
By Erin Clements

Sunday's Academy Awards brought together movie's biggest names — and many took to social media to give us a behind-the-scenes glimpse of what attending the star-studded event was really like.

Whether getting glam before the main event or hitting the red carpet, celebrities shared plenty of photo-worthy moments on Twitter and Instagram. Here are some of our favorites.

Reese Witherspoon shared a collage of her pre-show prep:

Best Actress nominee Brie Larson shared a photo of her pre-Oscars meal — avocado toast and bacon:

Larson's "Room" co-star Jacob Tremblay shared a photo traveling to the red carpet with his parents:

Sylvester Stallone posed in a blue tuxedo before he left for the event:

MORE: See the highlights, best moments from the 2016 Academy Awards

Heidi Klum shared a peek at her hair and makeup.

Drew Barrymore shared a sweet throwback snap of herself on the Oscars red carpet in 1982.

Giuliana Rancic posted a photo of herself primping for the big night.

Naomi Watts showed off the bold lip color she'd chosen for the evening.

RELATED: Oscars red carpet 2016: See the best-dressed celebrities

Reese Witherspoon posed for a photo with her "beauty squad."

She later showed the final results — and her stunning jewelry.

Sam Smith sported a dapper tux on the red carpet.

Priyanka Chopra revealed some gorgeous statement earrings.

Anne Hathaway wished this year's nominees luck with a sweet photo.

Host Chris Rock shared a photo of himself fine-tuning his opening monologue.

Chrissy Teigen gave a glimpse of her show-stopping beaded gown.

RELATED: Chris Rock addresses #OscarsSoWhite in Academy Awards monologue

She later posed affectionately with husband John Legend on the red carpet.

Mindy Kaling picked up some Girl Scout cookies during the ceremony.

Sofia Vergara shared a cute moment with 9-year-old Tremblay.