An Everlasting Piece (2000)
An Everlasting Piece is a 2000 American comedy film. The movie was directed by Barry Levinson. It was written by and starred Barry McEvoy. The plot involves two wig salesmen, one Catholic and one Protestant, who live in war-torn Belfast, Northern Ireland, in the mid-1980s. The supporting cast includes comedian Billy Connolly as an patient in a psychiatric hospital.
More at Wikipedia.