UPDATE: Monday, Aug. 31 (1:20 p.m. EST) – For years, Bill Murray has been reluctant to star in a third Ghostbusters remake, and now, we know why.

The comedian opened up to Vulture about his hesitation to star in Paul Feig’s latest reboot.

“You know, they were incredibly nice to ask me, and I really enjoyed being there,” Murray explained. “They have such a jolly group, and they are going to have great success with this project. I didn’t want to overshadow [them] or anything, and I feel really good about it.”

Murray’s decision to star in the upcoming film came after “years” of deep thought on the matter — and some serious convincing from Melissa McCarthy and Kristen Wiig. “I like those girls a lot…I mean, I really do. They are tough to say no to. And Paul is a real nice fellow,” he revealed.

Murray continued, “I thought about it for a very long time […] Like, many, many months. No, that’s not right. I was seriously thinking about this for years, really … It kept eating at me, and I really respect those girls.”

He ain’t afraid of no ghosts!

Dr. Peter Venkman will be strapping on his proton pack to take on spooks for a third time, with The Hollywood Reporter confirming that Bill Murray will appear in the upcoming Ghostbusters reboot.

The comedy icon was spotted in Boston on his way to the set of the flick, starring Melissa McCarthy, Kristin Wiig, Kate McKinnon and Leslie Jones as a new quartet of Ghostbusters.

RELATED: “GHOSTBUSTERS’ CAST VISITS KIDS AT CHILDREN’S HOSPITAL

THR“s report comes as something of a surprise, since Murray has previously expressed his staunch opposition to reprising the role for a third time, explaining that since Ghostbusters II wasn’t as warmly received as the original he didn’t see the point of doing another one.

RELATED: CASTING CALL — STARS NAB A NEW ROLE

On this interview with David Letterman from earlier this year, Murray dismisses rumours he would appear in the Ghostbusters reboot as “crazy talk”; and describes constant discussion of his involvement as “my nightmare.”; Watch: