How many movies have George Hearn and Stephen Sondheim collaborated on?

They have worked on 4 movies together! Their first movie together was Sweeney Todd: The Demon Barber of Fleet Street (1982) while their highest rated movie together was Sondheim! The Birthday Concert (2010). They have not worked together since Sondheim! The Birthday Concert (2010). They are most known for their drama films together.