'Monsters Inc. 3' To Feature Adult Boo? Pixar Director Pete Docter Talks Sequel, Boo Voice Actress Hopes For A Reunion

Is Pixar planning new "Monsters Inc." movie? Could the third installment be a sequel featuring an adult version of Boo? Pixar director Pete Docter talks about a potential "Monsters Inc. 3" as the film celebrates its fifteenth year anniversary this month.

Pete Docter reminisced about "Monsters Inc.," which was first released in 2001, with Entertainment Weekly. He cites that in the early developments of the movie's follow-up, there was actually a plan to feature Boo as an adult.

"Part of that idea was like a Peter Pan-type thing, where [Wendy] had been visited by Peter Pan as a kid and had sort of half-forgotten who he was," Pete Docter said. But this idea was scrapped in favor of the prequel, "Monsters University," which arrived in theaters in 2013. This film featured Sully (John Goodman) and Mike Wazowski (Billy Crystal) in college before Boo was even born.

Peter Docter makes it clear, however, that Pixar has no active plans to do "Monsters Inc. 3" for now. Yet he's also not completely shutting down the idea. "You never say never - who knows what will happen?" the director said.

If the studio does give "Monsters Inc. 3" a go, then the production team might go back to developing Boo's adult storyline. Fans would surely embrace this idea about finding out what happened to Boo after the first "Monsters Inc."

Incidentally, the girl who voiced Boo in the first film is actually a grown-up 20-something yoga instructor. Mary Gibbs is on Instagram and recently shared a photo of herself and "Monsters Inc." co-star John Goodman.

John Goodman and I at the Monsters Inc premiere

A photo posted by Mary Gibbs (@yoga_boo) on Sep 24, 2016 at 8:36pm PDT

Mary Gibbs said on "The Tiara Talk Show" that she got the part through her dad, who was a storyboard artist on "Monsters Inc." She hasn't seen John Goodman nor Billy Crystal now that she's an adult, so she's hoping for a reunion. "Hopefully, I would get to reconnect with them soon. That would be really awesome," the 20-year-old said.

Both "Monsters Inc." and "Monsters University" did well at the box office when the films were released. The films grossed a combined billion dollar profit worldwide, Box Office Mojo reports.