'Is a sociopath or a psychopath capable of love?': Zac Efron on his Ted Bundy film

Zac Efron portrays Ted Bundy, one of the most prolific serial killers of all time, in Extremely Wicked, Shockingly Evil and Vile. Georgia Humphreys chats to the actor, his co-star Lily Collins, and director Joe Berlinger about their experience of bringing the horrifying story to life.

There have been various opportunities for Zac Efron to take a darker turn as an actor. But the former Disney star, who became a teen heartthrob around the world thanks to the High School Musical franchise, has always been hesitant, to make sure it's the right sort of role.