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Zac Efron<\/strong><\/a> and Jeremy Allen White<\/strong><\/a> got on great when they filmed Iron Claw<\/em> together, but there\u2019s still a silent rivalry as they vie to be Hollywood\u2019s No.1 six pack king \u2013 which has them both pumping iron and working on their bods like never before.<\/p>\n \u201cJeremy really looks up to Zac. He\u2019s always going on about how great his body is and how much he knows about working out,\u201d a source exclusively tells Life & Style<\/em>. \u201cJeremy always puts him up on a pedestal whenever he\u2019s asked about their workouts, which Zac loves, but in reality, Jeremy trains just as hard and is just as fit.\u201d<\/p>\n Zac, 36, and Jeremy, 33, starred in the 2023 film Iron Claw<\/em>, based on the true story of pro wrestling brothers Kevin Von Erich and Kerry Von Erich. The A-list actors underwent intense transformations to bulk up for the film, ensuring they accurately portrayed professional athletes on screen.<\/p>\n \u201cThey have this good-natured competition when it comes to their bodies and how hard they can work out. It started when they were shooting their movie together but it has continued to this day,\u201d the insider explains. \u201cThey send each other selfies from the gym and whenever they get together, they\u2019ll hit the weights and see who can bench press more.\u201d<\/p>\n The competition between the two actors is \u201cvery friendly\u201d but there\u2019s no question that there is \u201csome genuine rivalry\u201d due to the cutthroat nature in Hollywood.<\/p>\n \u201cThey\u2019re both the same type when it comes to casting, so they do go up against each other for roles and right now Jeremy is beating out Zac when it comes to accolades and attention,\u201d the source says. \u201cThat\u2019s a bit tough for Zac to swallow.\u201d The insider adds that the High School Musical<\/em> alum is a \u201ccompetitive guy\u201d but The Bear<\/em> star is equally so.<\/p>\n \u201cEven though he tries to act nonchalant about it all, he wants to win, they both want the crown of the fittest guy in the biz,\u201d the insider concludes.<\/p>\n The Shameless<\/em> alum previously praised his costar for his seamless transformation into the wrestling star, noting that it wasn\u2019t an experience he personally enjoyed. \u201cZac\u2019s a maniac,\u201d Jeremy told Esquire<\/em><\/a> in May 2023. \u201cHe\u2019s so focused and knowledgeable on training, diet, all that. 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.\u201d<\/p>\n When it came to his own wellness routine, the New York native didn\u2019t enjoy the process of morphing into the wrestling champion as he was forced to \u201ceat all the time.\u201d<\/p>\n \u201cYou\u2019re trying to consume as much as you possibly can, and, to be honest, you don\u2019t feel great,\u201d he told the outlet. \u201cI was training as well, but, I don\u2019t know, trying to get that big, it\u2019s no way to live.\u201d<\/p>\n \u201cIn the morning, I would have waffles, almond butter. In the middle of the day, I was eating turkey patties and avocado all the time. It\u2019s really just gross,\u201d he concluded.<\/p>\n<\/p><\/div>\n