Mark O'Regan is known for The Commitments (1991), In the Land of Saints and Sinners (2023) and Leap Year (2010).

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Michael Aherne, Robert Arkins, Angeline Ball, Dave Finnegan, Bronagh Gallagher, Félim Gormley, Glen Hansard, Maria Doyle Kennedy, Dick Massey, Ken McCluskey, Johnny Murphy, and Andrew Strong in The Commitments (1991)

Liam Neeson, Ciarán Hinds, Kerry Condon, and Jack Gleeson in In the Land of Saints and Sinners (2023)

Amy Adams and Matthew Goode in Leap Year (2010)

Jared Leto in The Last of the High Kings (1996)

Mark O'Regan(I)

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