Zac Efron's steamy shirtless pic shows body transformation that blew co-stars 'out the water' -

Zac Efron has sent fangirl hearts racing as he posts a shirtless picture of his wrestling body for his new film, The Iron Claw.

The movie sees Efron play the role of Kevin Von Erich, in a true-story portrayal of the Von Erich brothers, who made history in professional wrestling in the early 1980s, showcasing both tragedy and triumph. The 36-year-old has now taken to Instagram to show off his ripped physique for the role, and to show his admiration for the athletes.

Zac Efron shows off ‘hench body’ in new shirtless pic

Taking to his 62 million Instagram followers, the High School Musical actor shared a shirtless black and white photo of himself, showing off his butch physique, which was built for the role in the new Hollywood blockbuster.

The star treated fans to as he can be seen showing off his abs, arms, and muscly legs as he smiles in the changing rooms, wearing nothing more than some tiny tight underpants. What more could a fan want?

However, Zac wanted the focus to be on more than just his hot bod, as he wrote in the caption: “I have so much admiration and respect for the world of Professional Wrestling and to the sacrifice and dedication of the athletes…

“These guys tour for MONTHS putting their bodies on the line every day to perform. Was an honor to step into the ring and learn from one of the best @chavoguerrerojr.”

Of course, this didn’t stop fans thirsting in the comments, as the pic also went viral on X, formerly known as Twitter.

“That’s MY man,” exclaimed one.

“Thank…you so much for this post,” said another star-struck fan.

“Idc what y’all say he’s still v handsome,” a third wrote, referring to his surgery after breaking his jaw in a freak accident.

Jeremy Allen White calls his co-star a ‘maniac’

The Bear star Jeremy Allen White stars alongside the Disney alum in the new film, playing brother Kerry Von Erich. He recently praised Efron for his dedication to the film.

“Zac’s a maniac. He’s so focused and knowledgeable on training, diet, all that,” he told Esquire.

“In terms of a physical transformation, I think he kind of blew us all out of the water. He looks really amazing in this thing.”

The movie was released in the United States on December 22, but unfortunately for UK fans, they’ll have to wait until Feburary 9 to see Zac’s body in action.