Former Melrose Place star Katie Cassidy (Juliet) is ready to make waves on Gossip Girl this season, but don't think she's going to be *the* Gossip Girl.

"We're not going to find out who Gossip Girl is this season," said executive producer Stephanie Savage, definitively. Really? Because from what we hear, Katie's Juliette is a bit of a troublemaker who knows everything about the Gossip Girl cast, as evidence by that creepy stalker map she has in her apartment.

"This is definitely a big story for us. Katie's with us for a good long time — at least for the first half of the season. By the time the mystery is over, you'll know everything there is to know about Juliette," Savage teases. "Her entire back story will be revealed."

Sounds like good ol' Nate should watch out, considering she'll be his new GF. "The relationship definitely starts off as something with an agenda behind it, but by the end, it's real for both of them." She laughs, "Isn't that always how it happens? You start a relationship trying to use somebody and you fall for them every time."

Source: Zap2it