Movie

The 28-year-old actor shares on Instagram a photo of him flaunting his massive biceps during his workout session.

• Feb 5, 2016

AceShowbiz - Zac Efron took to Instagram on Thursday, February 4 to share a photo of him showing off his muscles. In the picture, Zac was working out his massive biceps. "Back and bi's #baywatch," he captioned it.

The 28-year-old actor will be starring in upcoming "Baywatch" movie alongside Dwayne "The Rock" Johnson. The film adaptation of the beloved TV series is set to start shooting soon. Fans are getting ready to watch their idol go shirtless in the movie.

Back and bi's #baywatch

A photo posted by Zac Efron (@zacefron) on Feb 4, 2016 at 1:28pm PST

  Editors' Pick

• Ice Spice Caught Smoking Weed Next to Lovey-Dovey Taylor Swift and Travis Kelce at Coachella
• Halle Bailey Praises 'Amazing Daddy' DDG Amid Split Rumors
• Donald Trump Roasted After Dozing Off During First Day of Trial
• Henry Cavill Breaks Silence on Girlfriend Natalie Viscuso's Pregnancy After Her Baby Bump Debut
• Alexia Nepola Reacts to Husband Todd's Divorce Filing: 'I'm Shocked and Heartbroken'

In late January, Zac took a swimming class to make sure his swimming technique is perfect in the upcoming movie. The "High School Musical" actor went shirtless and showed off his fit physique when he hit a swimming pool in Los Angeles on January 27. He wore nothing but a black skintight swimsuit paired with a white swim cap and a pair of goggles.

"Baywatch" movie, also starring Kelly Rohrbach and Alexandra Daddario, is scheduled to hit U.S. theaters on May 19, 2017.