How many movies have John Legend and Ken Ehrlich collaborated on?

They have worked on 4 movies together! Their first movie together was The Night That Changed America: A Grammy Salute to the Beatles (2014) while their highest rated movie together was Sinatra 100: An All-Star Grammy Concert (2015). They have not worked together since Stayin' Alive: A Grammy Salute to the Music of the Bee Gees (2017).