It looks like there could be!
Alexis Bledel shared the news of the strong possibility that there may be a 'Sisterhood of the Traveling Pants 3' with 'The Tonight Show Starring Jimmy Fallon'.
When asked whether or not she's kept up with co-stars Blake Lively, America Ferrara, and Amber Tamblyn, Bledel said, “We don’t get to see each other a lot because everybody is busy with work or family, but when we're all in the same town, we do. And we just pitched a third movie and I hope it comes together. It would be so great.”
Bledel went on to say that a third iteration of the franchise “would be the best thing.”
Blake Lively also told Entertainment Tonight, “I think it could really happen.”
“I think that people who love the movie want to see it. So, I mean, fans have gotten bigger movies made,” said Lively.