Ronan O'Casey was an actor and producer, known for The Larkins, Bitter Victory and 1984.

At the age of six, Ronan started acting on stage in Ireland. He has performed in music halls and numerous theaters in Dublin (notably at the Gate Theatre) and London.

His film credits include Give Us This Day, The Gilded Cage, Murder on Approval, The Double Exposure of Holly, The Protector and The Beverly Hillbillies.

Television credits include Falcon Crest, Santa Barbara, Ryan's Hope, The New Forest Rustlers, ITV Play of the Week, The Trollenberg Terror and The Vise.