Arnold Schwarznegger. The former governor of California and body builder turned actor once did porn. That's one muscle we never really get to see.

Girl next door, Cameron Diaz, once did porn to give her career a jump-start. Looks like it worked.

Even David Duchovny starred in porn at one time. He dropped his pants and rolled the dice, ending up as an actor in Hollywood.

It may be hard to believe, but Helen Mirren did her fair share of porn. Women still envy her breasts today.

Jackie Chan is an action star, action choreographer, martial artist and stunt performer. One of his former stunts was a gig in porn.

Marilyn Monroe was a sex symbol in the 1950s, and her candle never died. Even today, women try to emulate the beautiful actress, but hopefully they don't do porn like she did.

Good old Joey Tribbiani in porn? Yep, Friends' star Matt LeBlanc started his career in porn. How you doin'?

She's the fast talking talent manager on HBO's "Entourage," but back in the day, her lips were doing more than talking. Perrey Reeves once starred in porn.

Sasha Grey. We all know her from the hit HBO show "Entourage," and based on her character, it may not be a stretch that she once did porn. Whatever porn she did propelled her into the Hollywood limelight.

Sylvester Stallone, The Italian Stallion once took porn for a ride. Back in the day, Sly did what he could to survive and make it in Hollywood. Yo Adrian!