Star Material: See Celebrities' Most Embarrassing — And Adorable — Childhood Photos

Dec. 9 2014, Updated 1:58 p.m. ET
From cute little kids by the pool to big hair in high school can you guess who these celebrities are from their childhood photos?

Guess who?

Zac Efron

Guess who?

Blake Lively

Blake Lively

Guess who?

Emmy Rossum

Guess who?

Tamra Barney

Guess who?

Katy Perry

Guess who?

Ryan Reynolds

Ryan Reynolds

Ryan Reynolds

Guess who?

Chloe Sevigny

Guess who?

Guess who?

Michael Phelps

Guess who?

Guess who?

Guess who?

Elizabeth Banks

Guess who?

Halle Berry

Guess who?

Sandra Bullock

Guess who?

Naya Rivera

Guess who?

Rachel Zoe

Rachel Zoe

Guess who?

Jessica Biel

Guess who?

Rachel Ray