Born on May 30, 1953, in Dublin, Ireland, he is a distinguished actor known for his versatile roles in both film and television. He began his acting career at the Abbey Theatre in Dublin and gained international fame with his role as Miles O'Brien in the "Star Trek" series. Over the years, he has appeared in numerous films, including "The Commitments," "The Snapper," and "Layer Cake." His talent has earned him critical acclaim and several award nominations, making him a respected figure in the industry.