Gerard Butler | Train Like A Celeb

In the pantheon of super-jacked movie stars, a few stand out, bulging biceps and shoulders above the rest. One of the most iconic movie muscle moments came in 2007's 300, when Gerard Butler's King Leonidas led his 300 Spartan warriors into battle without a single shirt or visible ounce of body fat between them.

Butler hasn't stayed at quite that level of cut since then, but the Scottish actor has worked his way into impressive shape for other action-packed films like Law Abiding Citizen, Den of Thieves, and the Olympus Has Fallen series.

To build up his body for a few of these roles, Butler has worked with trainer Joe Dowdell, C.S.C.S., a New York City-based fitness coach. The two men have been working together to keep Butler in shoot-shape since 2003, when he was prepping for The Phantom of the Opera (Butler and the 300 cast worked with trainer Mark Twight), then again for Law Abiding Citizen and Den of Thieves.