How many movies have Dennis Keiffer and Matt McKinnon collaborated on?

They have worked on 2 movies together! Their first movie together was Bird Box (2018) while their highest rated movie together was Birds of Prey (and the Fantabulous Emancipation of One Harley Quinn) (2020). They have not worked together since Birds of Prey (and the Fantabulous Emancipation of One Harley Quinn) (2020).