How many movies have Melissa Muller and Valerie Biggin collaborated on?

They have worked on 3 movies together! Their first movie together was Signed, Sealed, Delivered: One in a Million (2016) while their highest rated movie together was Signed, Sealed, Delivered: Lost Without You (2016). They have not worked together since Walking the Dog (2017). They are most known for their tv movie films together.