9 Celebrities Who Had To Get Super Buff For A Role, From Zac to Christian

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Many actors and actresses dream of landing a coveted action role, but with those roles often come responsibilities. Namely, one responsibility: to get your ass (and the rest of your body) in tip-top shape for the screen. That, of course, is much easier said than done — which is why we should applaud these celebrities for doing it. Here are the 9 celebrities who sweat their way to action star status.

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