He is probably best known to American television audiences as the troubled but lovable Mark Healy of the long-running "Roseanne," but Glenn Quinn is about to make a whole new impression as one of the stars of "Angel," the WB's hotly anticipated "Buffy the Vampire Slayer" spin-off premiering this fall. Quinn plays David Boreanaz's spiritual mentor, an Irish guardian angel that everyone in the country – especially the girls – will wish were watching over them.

Glenn moved to the States from his home town of Dublin, Ireland at the age of nineteen, and was soon spotted by casting director Johanna Ray ("Twin Peaks", Blue Velvet, Wild at Heart), who helped him get representation and before long, his audition for "Roseanne." Swallowing his Irish accent, he was so convincingly American that his "guest star" role lasted years – until the series ended in 1997.

During the run of the sitcom, he was also tapped to star in the shortlived but critically acclaimed medieval drama, "Covington Cross." That series' early demise was mourned, but for Glenn, it was probably just as well, since doing two series at once is particularly torturous when they are produced on different continents.

His feature credits include Shout, a coming-of-age movie in which he co-starred with John Travolta and shared a screen kiss with Gwyneth Paltrow; Dr. Giggles, Live Nude Girls and Men (a.k.a. Some Girls).

Quinn currently resides in Los Angeles, close to the hot new nightclub GOLDFINGERS, which he co-owns with fellow Irishman and close friend Mark Leddy.