Alexa Vega as Catherine "Cat" Humphrey
Chase Crawford as Nathaniel "Nate" Archibald
Zac Efron and Nicholas "Nick" Archibald
Penn Badgley as Dan Humphrey
Taylor Momsen as Jenny Humphrey
Blake Lively as Serena van der Woodsen
Leighton Meester as Blair Waldorf
Ed Westwick as Chuck Bass
And the rest of the Gossip Girl Characters as Themselves