How many movies have Cillian O'Gairbhi and Tatja Seibt acted in together?

They have worked on 1 movie together! Their first movie together was Der Irland-Krimi: Die Toten von Glenmore Abbey (2019) and was their highest rated movie together. They have not worked together since Der Irland-Krimi: Die Toten von Glenmore Abbey (2019).