How many movies have Denis O'Brien and John Cleese collaborated on?

They have worked on 5 movies together! Their first movie together was Life of Brian (1979) and was their highest rated movie together. They have not worked together since The Movie Life of George (1989). They are most known for their comedy films together.

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Executive Producer
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Wise Man #1 / Reg / Jewish Official / First Centurion / Deadly Dirk / Arthur
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Screenplay