How many movies have George Lucas and Johnny Weissmuller Jr. collaborated on?

They have worked on 3 movies together! Their first movie together was THX 1138 (1971) while their highest rated movie together was American Graffiti (1973). They have not worked together since Ewoks: The Battle for Endor (1985). They are most known for their science fiction films together.

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Badass #1
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