How many movies have David Coverdale and Ritchie Blackmore acted in together?

They have worked on 4 movies together! Their first movie together was Deep Purple - California Jam 1974 (1974) while their highest rated movie together was Deep Purple - History, Hits & Highlights '68-'76 (2009). They have not worked together since Deep Purple - Deepest Purple (2010). They are most known for their music films together.