The 26-year-old actor later took the stage to introduce Karen O, who sang “The Moon Song” from the film Her, which is nominated for Best Original Song.
A few weeks earlier, Zac showed off his bulging biceps as he made his way out of El Capitan Theatre after making an appearance on Jimmy Kimmel Live! in Hollywood.
Make sure to watch the 2014 Oscars, hosted by Ellen DeGeneres, RIGHT NOW at 8:30/7:30c on ABC!
FYI: Zac is wearing a Calvin Klein tuxedo, shirt, and tie, Johnston & Murphy shoes, and a 1967 rose gold vintage Rolex from Wanna Buy a Watch?.