Sylvester Stallone has recruited a formidable team of action heroes for his explosive new movie, 'The Expendables,' and ET's Kevin Frazier is with the veteran star/director, who pokes fun at his stunning physique at age 64, saying, "It's just, like, I'm embalmed."

"Men are different: They're like big kids to the very end, and at the very end they're big kids with arthritis; they just don't change," says Sly about the team spirit of 'The Expendables.' "I wanted to bring that camaraderie, that brotherhood, to a film, and that hadn't been done for awhile."

In theaters August 13, 'The Expendables' finds a group of mercenaries on a mission to overthrow a South American dictator. Alongside Sly, Dolph Lundgren, Jason Statham, Jet Li, Randy Couture, Steve Austin, Mickey Rourke, Terry Crews and Eric Roberts also star in the movie, with appearances by Bruce Willis and Governor Arnold Schwarzenegger.

"Luckily we didn't have any divas except for me," Sly says of his co-stars, joking, "Everyone was lining up to break my neck, saying, 'Who's going to kill him today if he gets an attitude?' And you had a crew that could do it."

Of lining up Willis and Schwarzenegger to do a scene together, Sly admits, "We were very nervous. ... When you're standing face-to-face with someone who has actually been a very competitive person with you, and now it's on, you go, 'Jesus, be careful what you wish for.' But it all worked out. ... They impact the room."

The movie also represents an onscreen reunion between Sly and Dolph, who famously squared off in a Russian boxing ring in 'Rocky IV.'

"I don't like Swedish people at all; they're too tall, too handsome, too tough -- it just gets to you," says Sly with a smile. "He just stepped up and nailed it, and I wish I had more screen time for him because [Dolph plays] just one of those interesting, duplicitous characters you love, hate 'em, love, hate 'em."

"[Sly] asked me to play this crazy Viking guy who likes to kill people and do a lot of damage," says Dolph. "Obviously we've kept our friendship up over the years. ... We enjoyed the experience more of doing another film together, and squaring off again."

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