In case there was still any doubt as to whether Bill Murray was returning as Dr. Peter Venkman in Ghostbusters: Afterlife, rest assured he’s the lynchpin to the film’s success and according to Vanity Fair, the notoriously difficulty actor is having a ball on set.

“The script is good,” Murray said. “It’s got lots of emotion in it. It’s got lots of family in it, with through lines that are really interesting. It’s gonna work.”

Vanity Fair reports: Ever since the new project was announced a year ago, fans have wondered if the stars of the earlier films would return, and tidbits of news have been leaking out sideways. Murray was definitely on the set at various times during that week last fall, as were Dan Aykroyd and Ernie Hudson, reprising their respective roles as Peter Venkman, Ray Stantz, and Winston Zeddemore. Also visiting the location during those days were Annie Potts the long-suffering receptionist Janine Melnitz and Sigourney Weaver who played frequent malevolence magnet Dana Barrett. (Rick Moranis, who was accountant Louis Tully in the original, has largely withdrawn from performing over the past 20 years and did not return.) Exactly how the originals will figure into the July 10 release will be left for the film to reveal, along with how the narrative deals with the absence of Egon Spengler since actor Harold Ramis, who cowrote the original movie with Aykroyd, died in 2014. “Well, we are a man down. That’s the deal,” Murray said, pursing his lips, looking down. “And that’s the story that we’re telling, that’s the story they’ve written.”

Watch the trailer below.