Zac Efron Shows His Muscles on a Motorcycle for 'Baywatch'!

Zac Efron shows off his muscles in a tight t-shirt while filming scenes for Baywatch on a motorcycle on Monday (February 29) in Miami, Fla.

The 28-year-old actor filmed with some bikini-clad extras that day! Meanwhile, over in Boca Raton, Zac‘s co-star Alexandra Daddario was seen practicing her Baywatch run before filming her scenes!

“Meet Brody. Cruising into The Bay with nothing to his name but a duffle bag and a bike #baywatch,” Zac tweeted about his day on set.

60+ pictures inside of Zac Efron and Alexandra Daddario on set for Baywatch…