Zac Efron [1] was spotted on the set of Baywatch in Boca Raton, FL, on Monday, looking like his usual hot self. The actor showed off his bulging biceps in a green t-shirt while filming on the street, where, naturally, onlookers stopped to get a glimpse of the handsome star [2]. That same day, Zac uploaded a photo of his character Brody [3] on Instagram, writing, "Meet Brody. Cruising into The Bay with nothing to his name but a duffle bag and a bike #Baywatch."

Zac's costar Dwayne Johnson has also been hard at work [4]. Just last week, Dwayne brought his signature charm and muscular physique to the set, where he was seen shooting a rescue scene with Zac and their costar Ilfenesh Hadera [5]. Read on to see more of Zac and his insane muscles, and then see how much he's changed in the past decade [6].