“Alpha balls”: First look at Zac Efron and The Rock on the set of Baywatch

HE WASN’T wearing the tiny red boardshorts made famous by David Hasselhoff, but Zac Efron looks just as sexy on the set of Baywatch reboot.

HE WASN’T wearing the tiny red boardshorts made famous by David Hasselhoff, but Zac Efron looks just as sexy on the set of the Baywatch reboot.

Filming for the upcoming movie kicked off in Florida this week.

Zac showed off his guns in a tight tee while filming scenes on a boat with co-star Dwayne “The Rock” Johnson.

Stretch before swimming..

Zac and The Rock goof around.

Zac Efron shows off his insane arms in a skin tight tee.

The Rock also gave fans an inside look at the first day of filming on Instagram — and gave a little TMI.

Along with a photo of Zac and him posing in their costumes, he revealed Zac’s character gets schooled with a “beach speech” about “alpha balls”.

“My character ‘Mitch Buchannon’ just gave @zacefron’s character ‘Matt Brody’ the all important beach speech about what it means to have manly ‘Alpha balls’. Zac’s adlibbed responses were brilliant! Talented and great dude. World get ready to have some fun, ‘cause the beach will never be the same again,” he captioned the pic.