See What Reese Witherspoon, John Stamos, and More Stars Looked Like as Teenagers

Reese Witherspoon

"On the set of my second movie ever, Wildflower," she captioned this early '90s photo.

Sofía Vergara

The Modern Family star shared this photo of her teenage self taken in the '80s.

Dwayne "The Rock" Johnson

"We all start somewhere," he captioned this hilarious photo of himself at 15.

Mayim Bialik and Jennifer Aniston

Mayim posted this old photo of her and Jennifer on the set of Molloy in 1990.

Adam Levine

"1996 in the house," he caption this photo of his 16-year-old self. "That HARRIBLE (sic) 90s goatee took me an entire summer to grow."

Jennifer Lopez

She posted this picture of her running track during her days as a student at Preston High School in Bronx, NY.

Cindy Crawford (left)

"Some home-made dresses and braces," she captioned this old photo from her pre-supermodel days.

Hugh Jackman

The Wolverine star shared a photo from his teenage prep school days. "Yes, I thought I was cool," he captioned the pic.

John Stamos

John's "groovy prom pic" was taken sometime in the late '70s.

Ewan McGregor

The Irish star posted this photo of himself at 16 posing alongside his first car.

Andy Cohen

The Watch What Happens Live host posted this photo of his 15-year-old self taken in 1983.

Matthew McConaughey

The niece of Matthew's high school prom date posted this photo of the Oscar star taken sometime in the '80s.

Anderson Cooper

Before becoming a "silver fox," Anderson was a high school student posing alongside his mom.

Chris Pratt

"Before selfies, this was what 13 looked like," he captioned this photo.

Colin Powell

"I was doing selfies 60 years before you Facebook folks," he captioned this old school selfie he took when he was 16.

Mia Farrow

The Rosemary's Baby star posted this photo of herself at 15.

NEXT: Shiloh Pitt, Suri Cruise, and More Celebrity Daughters Who Look Just Like Their Famous Dads