How many movies have David Hartman and Oliver Dillon collaborated on?

They have worked on 2 movies together! Their first movie together was My Friends Tigger & Pooh: Friendly Tails (2008) while their highest rated movie together was My Friends Tigger & Pooh: Hundred Acre Wood Haunt (2008). They have not worked together since My Friends Tigger & Pooh: Hundred Acre Wood Haunt (2008).