These four friends form a sisterhood - of some traveling pants - in a movie by that name. Starring Blake Lively, America Ferrera, Alexis Bledel and Amber Tamblyn, "The Sisterhood of the Traveling Pants" was released in 2005.
The sisterhood of the traveling pants is unofficial, but the bond is strong. Blake Lively, America Ferrera, Amber Tamblyn and Alexis Bledel star in this 2005 film about four girlfriends who make a pact to stay together as their lives move in different directions.
Carmen: Rule number 8, no double-cuffing the pants. Tibby: Oh, good rule! That's so tacky... and you know what else is tacky? Tucking your shirt in when you're wearing a belt... Lena: Ok, I do NOT do that any more, I did that ONE time.