The 30-year-old actress also opened up about her 'best friend,' Ryan Reynolds.
Blake Lively is ready to slip back into those magical jeans.
ET's Nischelle Turner spoke with the 30-year-old actress at Lionsgate's presentation at CinemaCon at The Colosseum at Caesars Palace in Las Vegas on Thursday, where she revealed that there's a real possibility of a Sisterhood of the Traveling Pants 3.
"I think it could really happen," said Lively, who starred as Bridget Vreeland in the first two films, alongside Amber Tamblyn, America Ferrera and Alexis Bledel.
"I think that people who love the movie want to see it. So, I mean, fans have gotten bigger movies made," she added. "Deadpool is all thanks to the fans. So I'm saying we'll do it."
Sisterhood of the Traveling Pants 2 was released 10 years ago, in 2008 -- but hilariously made it into a new trailer for Deadpool (which stars Lively's husband, Ryan Reynolds).
"We have fun," Lively said of her and Reynolds' constant trolling of each other over social media. "We're best friends, so, you know."
For now, the actress is focusing on her new role in A Simple Favor alongside Anna Kendrick. Lively plays a mom who goes missing in the Paul Feig-directed thriller, while Anna Kendrick plays her mommy blogger friend looking into the mystery.
"It's a movie that's like, completely fun and you don't know whats gonna happen until the last possible moment," she described. "It's a fun movie to watch because it's thrilling and engaging, but the characters are so over-the-top and fun, that it's sort of comedic too."
As for whether Lively, who shares two daughters with Reynolds, gave Kendrick any advice on playing a mother, she said the Pitch Perfect star didn't need any.
"No, she's great! I mean, everything she did was perfect. I think that we both have very different styles of being human beings, and these characters, like aside from motherhood, we are very different from these characters," she explained. "So I don't think she needed any help."
A Simple Favor hits theaters on Sept. 14.
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