BFFs on Broadway! The stars of the coming-of-age film The Sisterhood of the Traveling Pants reunited once again in NYC on Saturday, Oct. 18. PHOTOS: Costars reunited Mom-to-be Blake Lively,.br br Blake Lively is all smiles while being reunited with her The Sisterhood of the Traveling Pants co-stars – Alexis Bledel, America Ferrera and Amber Tamblyn – in a brand new pic posted on.br br Sisters for life. America Ferrera opened up to Meredith Vieira on Thursday, Feb. 12, about a potential third Sisterhood of the Traveling Pants movie and her friendship with costars Blake Lively,.