How many movies have Kenneth Mars and Tress MacNeille acted in together?

They have worked on 10 movies together! Their first movie together was The Land Before Time II: The Great Valley Adventure (1994) while their highest rated movie together was The Little Mermaid II: Return to the Sea (2000). They have not worked together since The Land Before Time XII: The Great Day of the Flyers (2006). They are most known for their adventure films together.