How many movies have Melissa Gilbert and Michael Landon acted in together?

They have worked on 7 movies together! Their first movie together was The Dean Martin Christmas Show (1968) while their highest rated movie together was Little House on the Prairie: A Merry Ingalls Christmas (2014). They have not worked together since Little House on the Prairie: A Merry Ingalls Christmas (2014). They are most known for their family films together.