Brían O'Byrne was that rare kind of actor who effortlessly navigated the worlds of film, television and the stage. The Tony Award-winning O'Byrne gained acclaim for his multilayered performance in the Broadway production of "The Beauty Queen of Leenane" (1998), "The Lonesome West" (1999), and the off-Broadway play "Frozen" (2004), in which he portrayed a sympathetic serial child killer. O'Byrne's versatility landed him a number of memorable film roles, most notably playing a priest in the Academy Award-winning drama "Million Dollar Baby" (2004) opposite Clint Eastwood and Hilary Swank. He proved his mettle on television, with high-profiles roles on the Showtime drama "Brotherhood" (2006-08) and the ABC sci-fi series "FlashForward" (2009-10). But it was O'Byrne's earnest portrayal of a likeable cheating husband on the HBO miniseries "Mildred Pierce" (2011) that catapulted him to A-list status in Hollywood and proved that he was undeniably one of the most compelling and dependable performers in the business.