From Teen Vogue:

What's next for you?

I'm playing Zac Efron's little brother in The Life and Death of Charlie St. Cloud. The movie is about these two brothers--Charlie (who's played by Zac) and Sam. They get into a car accident and Charlie survives, but Sam doesn't. Though, at sunset, Charlie can see and talk to Sam's ghost. I play the grown up, eighteen year-old version of Sam.

How was working with Zac?

He's such a cool guy. I was impressed by how he just was so chill, even though he has so much to deal with. After filming, he would sign autographs for like an hour an [sic] a half.