How Zac Efron Channeled His Bond With His Brother Dylan On Screen In 'The Iron Claw' (Exclusive)

Zac Efron chats with ET's Cassie DiLaura at the Los Angeles premiere of 'The Iron Claw,' which hits theaters on Dec. 22. The actor reflects on getting a star on the Hollywood Walk of Fame and having a movie premiere on the same day, calling it 'pretty incredible.' He opens up about how he likely channeled his bond with his own brother in his performance as Kevin Von Erich in the film. Plus, Zac shares how much fun he had working on the movie with his castmates, including Jeremy Allen White, Lily James and more, and how he'd love to work with them in the future again.