Jared Leto talks wearing a heavy costume for Tron: Ares, and why it was all worth it for the upcoming sci-fi film.

Rebel Wilson didn't hold back when discussing the weight gain she's experienced due to her work priorities.

Ben Foster lost 60 pounds in order to play a Holocaust survivor in the new movie The Survivor.

Mark Wahlberg usually needs to be in really good shape for his roles, but now he's...in a different shape.

Team Rebel is running strong!

Peter Berg wanted him to be "ripped" so here's what he did.

Losing weight is not the result most of us get at Disneyland.

Daaaaamn, good for him. He said he's lost and gained at least 1,000 pounds over the course of his life.

Tom Cruise is really going for it.

Fancy footwork and high temperatures don't always mix.

Netflix's Bodyguard is a thrilling British series known for its intense moments. We look at the highlights of this Richard Madden-starring series.

90 Day Fiance star Jorge Nava has lost 125 pounds while incarcerated in Arizona, and he's sharing how he managed to lose the weight and get fit.

Dude's entire body must be Play-Doh by now.

Jersey Shore: Family Vacation's Mike "The Situation" Sorrentino lost 36 pounds in prison from fasting and working out multiple times a day.

Peeing 3 times is involved. Just let him explain it...

The Great War on the big screen.

Yes, you read that right.