How many movies have Dan Hennah and Rick Porras collaborated on?

They have worked on 4 movies together! Their first movie together was The Frighteners (1996) while their highest rated movie together was The Lord of the Rings: The Return of the King (2003). They have not worked together since The Lord of the Rings: The Return of the King (2003). They are most known for their fantasy films together.

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Set Decoration
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Corsair of Umbar / Beacon Guard (uncredited)
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Supervising Art Director
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Co-Producer
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Set Decoration
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Co-Producer
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Rohan Recruit (uncredited)
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Supervising Art Director
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Art Direction
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Post Production Supervisor