How many movies have Barry Liu and Valerie Biggin collaborated on?

They have worked on 40 movies together! Their first movie together was Signed, Sealed, Delivered (2013) while their highest rated movie together was Signed, Sealed, Delivered: Lost Without You (2016). They have not worked together since Signed, Sealed, Delivered: To the Altar (2018). They are most known for their tv movie films together.