How many movies have Brendan Gleeson and Liam Neeson acted in together?

They have worked on 6 movies together! Their first movie together was Michael Collins (1996) while their highest rated movie together was Kingdom of Heaven (Director's Cut) (2005). They have not worked together since The Ballad of Buster Scruggs (2018). They are most known for their drama films together.

Role
Irishman (segment "The Mortal Remains")
Role
Impresario (segment "Meal Ticket")