How many movies have Ivan Reitman and Sigourney Weaver collaborated on?

They have worked on 5 movies together! Their first movie together was Ghostbusters (1984) and was their highest rated movie together. They have not worked together since Ghostbusters: Afterlife (2021). They are most known for their comedy films together.

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Ellen Mitchell
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Producer
Crew
Director
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Dana Barrett
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Producer
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Man Walking Outside Firehouse / Slimer (voice) (uncredited)
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Dana Barrett
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Producer
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Zuul / Slimer (voice) (uncredited)