Zac Efron is a big kid

Zac Efron says he’s a big kid at heart.

However, the super-sexy actor had to act mature on the set of his new film, The Lucky One.

“I am definitely still a big kid at heart,” admits Zac.

“But this role in The Lucky One is definitely my most mature role. I loved the experience. I had a phenomenal time doing it. It was hard. Every scene had a gravity to it in a way. I couldn’t improv, or laugh or tell any jokes. No fun stuff. I couldn’t sing!

“I would break in to song and dance but nobody would join me.”