How many movies have Billie Walters and George A. Romero collaborated on?

They have worked on 1 movie together! Their first movie together was Dawn of the Dead (1978) and was their highest rated movie together. They have not worked together since Dawn of the Dead (1978).

Dawn of the Dead (1978)

Role
Biker Chick Wearing Brown Headband
Crew
Director
Crew
Screenplay
Crew
Editor
Role
TV Director / Biker (uncredited)