How many movies have Frank Oz and Mary Harrison acted in together?

They have worked on 1 movie together! Their first movie together was The Adventures of Elmo in Grouchland (1999) and was their highest rated movie together. They have not worked together since The Adventures of Elmo in Grouchland (1999).

Role
Bert / Grover / Cookie Monster (voice)
Role
Additional Muppet Performer (voice)