Can You Guess Which Hollywood Heartthrob Tweeted Out This Adorable Childhood Pic? (PHOTOS)

Amanda Hasaka / April 26, 2012

Guess the Celebrity Sibling!
See if you can spot the famous resemblance.
Reach for the sky!

Before this actor made ladies swoon in rom-coms and beyond, he too was just a little tyke playing dress up. Looks like he’s always had the acting bug!

Any guess as to who it could be?

We’ll give you a hint — it’s his birthday today, and he has two different movies coming out this summer. Still don’t know? Put on your thinking cap, and play our guessing game in the gallery!