Ignorance is bliss for That '70s Show star Ashton Kutcher.

While most sitcom players typically sit on the edge of their seats this time of year awaiting word on renewal, the actor who plays goofy Michael Kelso says he just presumed that all shows would return to the network schedules next fall. He presumed right in the case of his own sitcom, which Fox has just renewed for an impressive two seasons.

"I really didn't know anything about the business so I kind of assumed that if they were making a TV show, and spending that much money to make a TV show, that it was gonna be on for a while," says Kutcher, 22. "I didn't know that some shows only go a couple of episodes and get canned because I never really paid attention. The shows that I watched were good shows, and they stick around for a while. So I didn't really realize that shows get canceled."

Kutcher's not alone in his showbiz naïveté. That '70s Show co-star Laura Prepon (Donna Pinciotti) says she's also learning a thing or two about what it takes to make it in the business.

"I had no idea there was so much to even getting picked up on the air," says the 20-year-old actress. "We did our pilot, then we had to get picked up, and keep the ratings and all that stuff. I had no idea about any of that. This is the first big TV thing I've ever been on."

"We're all really flattered," Prepon says on behalf of the show's ensemble cast. "It's like, amazing!"