Glenn Quinn

Glenn Martin Christopher Francis Quinn (28 May 1970 – 3 December 2002) was an Irish actor, best known for his portrayal of Mark Healy on the 1990s family sitcom Roseanne and his role as the half-demon Allen Francis Doyle on Angel, a spin-off series of Buffy the Vampire Slayer.
Glenn Martin Christopher Francis Quinn was born in Dublin on 28 May 1970, the son of Bernadette Quinn (née Brady) and Murty Quinn. His father was a musician and singer with the Miami Showband, who had seven No. 1 hits in the 1960s and 1970s. He was raised in the Cabinteely suburb of Dublin, and attended Clonkeen College. In 1988, at the age of 18 he moved to the United States along with his mother and two sisters, Sonya and Louisa, who settled in Los Angeles. He also had a third sibling whom he never met, his brother, Ciaran, who had been put up for adoption as a baby. Quinn did not know of his existence prior to h…