How many movies have Gertrude Olmstead and Sally O'Neil acted in together?

They have worked on 3 movies together! Their first movie together was The Callahans and the Murphys (1927) while their highest rated movie together was Show of Shows (1929). They have not worked together since Show of Shows (1929). They are most known for their comedy films together.

Role
Performer in 'Bicycle Built for Two' Number (uncredited)
Role
Performer in 'What Became of the Floradora Boys' & 'Meet My Sister' Numbers
Role
Nan Estabrook
Role
Rebecca O'Brien McCloskey