On the one hand we have Roman (Dylan O'Brien, in a double performance that ... Even after losing his twin brother, Dennis still feels like he's two separate people split in half.

Yet, for two people – his younger-half sister Olivia and his brother, Dylan Efron – he’s known as “big bro.” Zac and Dylan have the same parents – father David Efron and mother Starla ...

Zac Efron's brother Dylan appeared on season 3 of 'The Traitors' Zac Efron/Instagram Get to know Zac Efron’s brother, Dylan Efron. Zac and Dylan, who are four years apart in age, have a close ...

Dylan Efron is pleasantly surprised to say that he's the winner of Season 3 of The Traitors — though it's not exactly a shocker to his brother, Zac Efron. Until now, Dylan hasn't been able to ...