Daniel Craig

Age: 45
The actor first stepped into James Bond's shoes in 2006's Casino Royale (pictured). He has since gone on to play agent 007 twice more, in 2008's Quantum of Solace and 2012's Skyfall.
Age: 45
The actor first stepped into James Bond's shoes in 2006's Casino Royale (pictured). He has since gone on to play agent 007 twice more, in 2008's Quantum of Solace and 2012's Skyfall.
Age: 41
The WWE wrestler and former pro football player has maintained his chiseled physique as he's gone on to star in action-adventures including the Fast & Furious franchise and even family-friendly films like Tooth Fairy and Race to Witch Mountain.
Age: 44
"For Wolverine, I ramp it up," Jackman, pictured here in The Wolverine, told Men's Health. "I do an hour and a half a day in the gym and eat 1,000 calories more a day than I would normally. And I train really hard. I crank up the Godsmack and Metallica. I yell and scream, which helps me get into the character and have a bitch of a workout."
Age: 42
"I went from 165 to 212 [pounds]," Wahlberg told The Hollywood Reporter at the Pain & Gain premiere. "It was a lot of work and a lot of eating, but that's what the part required, so that's what I had to do."
Age: 42
Damon said he spent four hours a day for months lifting weights and doing cardio for his role in Elysium, pictured here. "It was really hard because I love to eat and drink!" the actor told People. "It's very hard to motivate me to get in shape."
Age: 51
“For my whole life it’s been training, just being on set, you have to be fit," Cruise, pictured here in Rock of Ages, once told Ryan Seacrest. "Because at the end of the day you have to be just as fresh at the beginning of the day."
Age: 46
The actor, seen here in Fast & Furious 6, told Men's Health that his workout regimen has changed over time. "At this stage in my life I'm trying to tweak out every body part," he said. "When I was younger I was trying to gain as much weight as possible. Now I focus on each body part to define it. I shock the muscle with two sets of power lifting and then go into higher-rep sets afterwards."