With "It's Always Sunny in Philadelphia" returning this week, Kaitlin Olson explains what bad words you can expect from her character Dee Reynolds in season 9.

HitFix caught up with the actress at the San Diego Comic-Con back in July.

"I definitely love the insults that they write for Dee and I adopt those in my real life," she says, which leads to her kids being labeled "d*ckbags." 

She also addresses the evolution of insults and cursing, the future of Dee's nerve-wracked stand-up career and weird fan behavior, which is always on full display at Comic-Con. There's even a cameo from one of her "Sunny" co-stars.

"It's Always Sunny in Philadelphia" returns tonight on its new channel FXX.
Dave Lewis has been a Los Angeles-based entertainment writer and editor for nearly ten years. Originally hailing from Minneapolis, he moved to L.A. in 1996 to attend USC, before working for various periodicals and web sites including a lengthy stint at Variety.com. He joined the HitFix staff in 2011.