This week's new Ghostbusters [1] movie has it all: an all-female lead cast [2], Chris Hemsworth as the receptionist of your dreams (sort of), and cameos from all the original Ghostbusters [3]. Well, almost all of them. If you're familiar with the '80s franchise, you'll notice that two of the original cast notably don't appear. Here's why.

Harold Ramis — the only member of the core not in the movie — is an obvious one, because sadly, he died in 2014, the same year the female-led reboot was announced. But there is another star who straight-out declined to be in the reboot: Rick Moranis. Moranis played the nebbish Louis Tully, who becomes an agent for a demon, and though he wasn't one of the original four, he was a huge part of the two movies.

So why did he say no? In a 2015 interview with The Hollywood Reporter [4], Moranis explained that he is "picky" these days, and the reboot just didn't appeal to him. After being offered a walk-on role, Moranis said of the movie, "I hope it's terrific. But it just makes no sense to me. Why would I do just one day of shooting on something I did 30 years ago?"