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

They have worked on 4 movies together! Their first movie together was Little House on the Prairie (1974) 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 tv movie films together.