MONDAY: Beverly Hills 90210
TUESDAY: Dawson’s Creek
WEDNESDAY: The O.C.
THURSDAY: One Tree Hill
TODAY: Gossip Girl
BLAKE LIVELY (Serena)
Starred in The Sisterhood of the Traveling Pants and its sequel.
LEIGHTON MEESTER (Blair)
Appeared on Tarzan, Surface, 24 and other shows.
PENN BADGLEY (Dan)
Starred in Do Over, The Mountain and The Bedford Diaries.
TAYLOR MOMSEN (Jenny)
Starred in How the Grinch Stole Christmas.
KRISTEN BELL (Gossip Girl)
The star of Veronica Mars.
JESSICA SZOHR (Vanessa)
Recurring roles on What About Brian and CSI: Miami.
Come back tomorrow for the last part!
TeenDramaWhore 
Wasn’t Penn Badgley in “John Tucker Must Die” w/ Sophia Bush?
Yes, he was! Good catch.