Zac Efron has been busy promoting his new movie, We Are Your Friends, which is great news for everyone who's been missing him so much. In recent weeks, he's made superhot appearances with costar Emily Ratajkowski, and he even had his red carpet debut with girlfriend Sami Miró! All of this pales in comparison to Friday night, though, when Zac Efron rolled up his sleeve to show off his beautiful bicep. Needless to say, we're mesmerized, and judging from the photos, even Emily couldn't look away. Keep scrolling to get up close and personal with Zac's muscle, and then allow us to show you why he's never looked so ripped.
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