An actor whose versatility is matched by the unpredictability of many of his career choices, "Dermot Mulroney" has been appearing in films since the early 1990s. Born in Alexandria, Virginia, on October 31, 1963, Mulroney developed an early interest in acting. After graduating from Northwestern University in 1985, he began acting in a number of made-for-TV movies, playing young men caught up in problematic teen romances in both "Sin of Innocence" (1986) and "Daddy" (1987). In 1988 he made his film debut in the Brat Pack western "Young Guns", portraying one of the titular group of Old West gunslingers. Despite the success of "Young Guns", Mulroney remained a relative unknown, appearing in a number of forgettable films. One exception was "Longtime Companion" (1990), a seminal AIDS drama that cast him as a young man who becomes one of the virus' earliest casualties. The actor continued to pop up in his career.