Heard some gossip? All the juiciest dirt on the privileged prep school teens of Manhattan's Upper East Side can be found on the blog of the all knowing albeit ultra-secretive Gossip Girl. While no one knows Gossip Girl's true identity, everyone in this exclusive circle relies on her website and text messages for the latest scoop. What's new?  Only that Serena van der Woodsen, played by Blake Lively (Accepted, The Sisterhood of the Traveling Pants), is back in town.

Trust Gossip Girl to give us all the reactions and drama surrounding her return. After all, keeping track of the shifting friendships, jealousies and turmoil in this wealthy and complex world isn't easy, but it's what Gossip Girl does best!

Meet the Cast Of "Gossip Girl"

Blake Lively plays Serena van der Woodsen. Lively has quickly become one of the most sought-after young actresses in Hollywood. She made her big-screen debut in Warner Bros.' "The Sisterhood of the Traveling Pants," for which she earned a "Breakthrough Performance" nomination at the "2005 Teen Choice Awards."

She graduated from high school last spring and resides in Los Angeles.

Leighton Meester plays Blair Waldorf. You may recognize Meester from her recurring role as the Britney Spears-like singer Justin Chapin on the hit series "Entourage", although she made her television debut at age 13 on "Law & Order".

When not working on "Gossip Girl," Meester passionately pursues her talent for music and creative writing. She has recorded a song for the soundtrack of her upcoming film "Drive-Thru." She currently resides in New York.

Penn Badgley plays Dan Humphrey. Badgley most recently starred in Tom Fontana's "The Bedford Diaries." He also had a role along side Jesse Metcalfe and Brittany Snow in the comedy "John Tucker Must Die."

In his spare time, he enjoys surfing, soccer, skiing, snowboarding, singing, and playing the guitar.

Chace Crawford plays Nate Archibald. Crawford starred in the 2006 movie "The Covenant," which opened at #1 in the box office.

Crawford splits his time between Los Angeles and New York City where Gossip Girl is shot on location.