Sigourney Weaver is officially on board for Jason Reitman's Ghostbusters 3. There has been speculation about the original cast coming back to reprise their roles, and this seems to be the best indication that everybody is returning. Weaver, who turns 70 in October, was discussing upcoming roles, including the Avatar sequels, which will see her return to New Zealand in order to shoot the live-action portions with James Cameron and crew. She'll be playing a new character in the Avatar sequels since her original character was killed off in the first installment.

When speaking of other new projects she is excited about, Sigourney Weaver brought up Ghostbusters 3. "It's going to be crazy working with the guys again!" says Weaver. She would not go into further details about the highly anticipated sequel, other than the fact she is reprising her role as Dana Barrett. Dan Aykroyd has teased involvement in the sequel for years now and has hinted the rest of the surviving cast will be on board too, but this is the first official confirmation about an original cast member returning. Plus, she says, "the guys," so we can only assume everybody is on board. Hopefully Rick Moranis jumps on board to.

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Bill Murray recently hinted he would be interested in returning to the Ghostbusters franchise. Murray considers himself, Dan Aykroyd, and Ernie Hudson as the caretakers of the Ghostbusters and after having a cameo in the all-female reboot, he admitted he would be open to returning to Jason Reitman's Ghostbusters 3. Speaking of Reitman, he has announced he is preparing a pretty big surprise for this Saturday's Ghostbusters Fan Fest, which could be the official cast reveal. In the announcement, the director included some old footage of Murray in between takes of the original movie.

Dan Aykroyd has been sworn to secrecy about Ghostbusters 3, but he is still talking about it quite openly. The actor has been the one to talk about anything having to do with the franchise over the years and he seems really excited about what Jason Reitman has prepared for the sequel. He recently had this to say about the sequel.

"Ivan Reitman's son Jason has written a beautiful script, I can't say too much about it but it's going to get made and hopefully there'll be some familiar faces. It's so different from even the first and second (film). This just takes it to a new generation and a new direction that is so warm, heartfelt and indeed, quite scary when you confront some of the issues that are being discussed."

It is believed production on Ghostbusters 3 will begin on July 14th in Calgary, Canada. It is expected to wrap on October 7th. With Ghostbusters Fan Fest happening this weekend, we should get a pretty substantial update from Jason Reitman. As for now, the surprise is a mystery. At least we know that Sigourney Weaver is officially going to play Dana Barrett in the highly anticipated sequel. The interview with Weaver was originally conducted by Parade Magazine.