New Gossip Girl star Michelle Trachtenberg is accused of being just that - and we're not even talking about her evil character Georgina Sparks.

A celebrity news rumor claims the actress was caught talking smack about newly wedded Pete Wentz as she waited at an airport last weekend.

When asked about the story by Ryan Seacrest on his KIIS-FM radio show, Michelle denied speaking negatively about the Fall Out Boy frontman, who's her ex-boyfriend, and who married Ashlee Simpson on Saturday.

Michelle Trachtenberg recently joined the Gossip Girl cast.

"Pete's been a friend of mine for years. I think the world of him. I would never trash him," said Michelle Trachtenberg, who added that she is "very happy" for the couple.

Nevertheless, Seacrest did pass on some sage advice: "If you're gonna talk crap on somebody, do it via text. That's how I roll."

Or get up in someone's grill at an L.A. nightclub, with cameras filming the entire exchange. That's how they roll on The Hills.

As for Gossip Girl, we can't wait to see if Georgina gets hers tonight on the season finale, "Much I Do About Nothing." Hours to go!

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.