How many movies have Conrad Vernon and John O'Sullivan collaborated on?

They have worked on 6 movies together! Their first movie together was Shrek (2001) and was their highest rated movie together. They have not worked together since Madagascar 3: Europe's Most Wanted (2012).

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Mason / Second Policeman (voice)
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Raoul / Soldier (voice)
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Mason (voice)
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Mason (voice)
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Creative Consultant
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Director
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Gingerbread Man / Cedric / Announcer / Muffin Man / Mongo (voice)
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Gingerbread Man (voice)
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Systems Administrators & Support
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Additional Dialogue