Dan Aykroyd has confirmed he still wants to make a third Ghostbusters film - but warned that he can't wait forever.
But he also pointed out that he and director Ivan Reitman "can't wait forever".
He said: "If they make this movie, in its current shape, they would be looking at a pretty hefty, nine-figure return. And so I'm hoping they get on to move it, but if they don't, I have multiple trains. I've got tracks six, seven, and nine, and that's four. I'll be moving on to other things, as will Ivan, by the way. We can't wait forever.
"And now's the time to tell the picture company, and I'd say this quite publicly, it's time now to sit down and make this movie, or you will lose your main principals, and you won't be able to make it without us, because we have rights, and now is time to make the movie... You don't take advantage of that in the next three or four months, I'll see you in Australia, where we'll be selling Crystal Head (the actor's vodka brand)."
It has previously been reported that Dan's co-star Bill Murray will not be in another sequel, but Dan said the door is also open for him to return.
"He's always there," he said. "He can always come back at any time and be rebuilt into it, as far as I'm concerned. That's up to his lawyer and the picture company to work out, but creatively, he will always be a part of it."