Pain & Gain: Mark Wahlberg & Dwayne Johnson Talk Bulking Up

Access Hollywood
Mark Wahlberg and Dwayne 'The Rock' Johnson are sighted on the set of 'Pain And Gain' on April 4, 2012 in Miami -- Getty Premium
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Mark Wahlberg and Dwayne 'The Rock' Johnson are sighted on the set of 'Pain And Gain' on April 4, 2012 in Miami -- Getty Premium

Mark Wahlberg and Dwayne Johnson had to kick their fitness up a notch for the upcoming bodybuilding movie, "Pain & Gain."

While both stars amped up their physiques for the Michael Bay-directed flick, Mark said he had to work hard.

"I had a huge preparation," Mark told Access Hollywood at the "Pain & Gain" premiere in Miami on Thursday. "And then also just letting loose, becoming this character. I was always fascinated with the world of bodybuilding."

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Mark's kids were divided on their dad's new look.

"My daughters didn't like it. My sons absolutely loved it," he said.

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Mark's ripped bod will come in handy for his next film (also with Michael Bay), "Transformers 4."

"We start [filming] in a couple of weeks," he said. "I'm ready to go."

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As for Dwayne, "The Rock" didn't have to undergo as much of a physical transformation for the film.

"I was really fortunate because I was coming off of 'G.I. Joe,' I was coming off of 'Fast & Furious' at that time too," he explained, referencing his recent films. "So a lot of those projects supported and fostered the type of training I was doing."

Adding, "The biggest thing with a movie like this -- the biggest departure was the vulnerability and showing this type of vulnerability, and playing a character who is easily influenced and who's just out of prison and looking for salvation."

"Pain & Gain" hits theaters on April 26.

-- Erin O'Sullivan

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