Zac Efron Responds to Matthew Perry Choosing Him for a Future Biopic (Exclusive)

Zac Efron chats with ET's Cassie DiLaura at the premiere of 'The Iron Claw' in Dallas. The actor pays tribute to the late Matthew Perry, sharing his reaction to the 'Friends' star wanting to cast him in a potential biopic. He remembers his '17 Again' counterpart as 'the best guy in the world.' Zac also breaks down his shocking transformation to play wrestling icon Kevin Von Erich, who inspired him to take his physical training seriously before filming. 'The Iron Claw' slams into theaters on Dec. 22.