'Sisterhood of Traveling Pants' was based on an Ann Brashares young-adult novel series of the same name. The second instalment of the franchise, titled, 'Sisterhood of Traveling Pants 2' released in 2008, reported People magazine.
The upcoming film will be based on the fifth book in the Brashares' series, actress Ferrera said at New York City launch of her husband Ryan Piers Williams's art exhibit, 'Monsters and Landscapes'.
"It's actually very much in the works. There's a fifth book, and what's wonderful about it is, and the series to begin with, is that it's really raw and honest about friendship and how hard it can be and how it changes as you grow up," Ferrara, 30, said.
Ferrara's co-star from the film, Amber Tamblyn, 31, attended the exhibit to help support Williams.