Who you gonna call? Not Bill Murray it seems.

The funnyman was expected to reprise his role in the third Ghostbusters movie, has Murray has revealed that busting ghosts again isn't such a foregone conclusion as expected.

He said, "I don't want to do it yet. Until there's a really good script I'll stay home and play snooker. There has to be a serious script before I leave the house. I won't make one just to make another one.

"I saw a guy talking about the end of the world a couple of years ago and I haven't seen that either. I'll believe it when I see a script."