Blake Lively hasn't even starred on Gossip Girl yet.

But the 19-year old actress is already set to star in the upcoming movie The Sisterhood of the Traveling Pants 2.

Lively had a role in the 2005 film The Sisterhood of the Traveling Pants, starring as Bridget Vreeland; she'll once again reprise that part in the sequel.

Also returning in the movie are the original core ensemble, including Ugly Betty's America Ferrera as Carmen Lowell, Joan of Arcadia's Amber Tamblyn as Tabitha "Tibby" Tomko-Rollins, and Gilmore Girls' Alexis Bledel as Lena Kaligaris.