Jennie Garth isn't letting a little thing like pregnancy get in the way of her big TV comedy debut. The 30-year-old former Beverly Hills, 90210 babe — who announced over the weekend that she's expecting her second child with actor-hubby Peter Facinelli in December — says her new Friday night WB sitcom What I Like About You will debut this fall right on schedule. "We're going full steam ahead without even stopping," she tells TV Guide Online.

At the Television Critics Association press tour in Pasadena, Calif., on Saturday, Garth was asked why she's not requesting time off like expectant mom Sarah Jessica Parker did on Sex and the City — forcing the HBO series to trim its fifth season order from 13 episodes to just eight. "I think that Sarah had some difficulties with her pregnancy," Garth responded. "And I've actually shot through a pregnancy before [during 90210] with my first child. I don't foresee there being any setbacks or problems. I'm very strong."

That's all well and good, but given What I Like About You's reliance on physical comedy — the pilot finds Garth falling over sofas and crashing into buffet tables — surely adjustments will have to be made. Further complicating matters, the pregnancy will not be written into the show — which revolves around the relationship between Garth and her younger sis, played by Nickelodeon star Amanda Bynes.

"We will write the physical comedy, and Jennie will do what she's comfortable doing," said exec producer Dan Schneider. "And in the situations where she doesn't feel comfortable, we'll get a stunt double. You can cheat a lot of things with different camera angles. We are not the first people to deal with this problem." Problem? "Challenge," he corrected. "We are not the first people to deal with this challenge."

And in case you're wondering whether Garth passes the comedy test in What I Like About You, the buzz at the TCA press tour was that she most definitely does. "She was hysterical," marveled Schneider of Garth's work on the pilot. "It looked like she was doing [a sitcom] for 10 seasons."

Well, some might argue that she was.