There were four Sisterhood of the Traveling Pants books, but instead of making three more movies, producers of the film series have combined the remaining stories in one mega sequel. Sister star Blake Lively detailed the plot of Sisterhood of the Traveling Pants 2.

"It's an accumulation of all three books," Lively said. "It's mostly the fourth book but in the beginning we tell what happened the past two summers. My storyline has a lot to do with the second book."

The first movie separated the sisterhood for their summer adventures. The sequel may separate them again, but for different reasons. "We each have our own storylines again but in our own personal lives we made plans to be together. The first movie was so much about the sisterhood and we're off doing our own things yet we have the sisterhood. This one is more about we're so caught up in our own lives, how do we find the sisterhood within this? Because we need each other. We're really kind of falling apart."

The crew saved the same jeans from the first film and updated their design. "Since two summers have gone by since, we've added decorations to the jeans as our lives have changed. As stories and experiences have been added to our own lives, we've added. We haven't tried them on though because we don't want to see how our own sizes have changed."