In 2007, Glenn was nominated for a TV Land Award in the category of "When Bad Teens Go Good" for his work on Roseanne despite having been dead since 2002.
Glenn appeared in 9 major motion pictures.
Glenn was 5' 10" (1.78 m) tall.
The role of Doyle on the Angel television series was the first time Glenn was permitted to use his Irish accent for a role on American television.
Glenn grew up in Cabinteely, Dublin, Ireland in the same neighborhood with Cinematographer/Producer Noel Donnellon and Animator/Director Paul Donnellon.
Glenn's death had nothing to do with his character on the Angel television series being killed. The character was meant to be temporary. Glenn's death occurred more than a year after the character was written out of the show.
Glenn is survived by his parents and both of his sisters.
Glenn died at a friend's house from a heroin overdose.
Glenn enjoyed hiking, soccer, motor sports, playing the drums, and playing the guitar.
Glenn worked in a factory, painted houses, and waited tables before pursuing an acting career.
Glenn's favorite band was U2.
Glenn was discovered by casting director, Johanna Ray, who helped him get representation.
Glenn's character, Mark Healy, on Roseanne was intended to be a one episode guest appearance, but became a guest starring role that lasted for seven years.
Glenn attended Clonkeen College, a Roman Catholic Christian Brothers school, in Blackrock, near Dublin.
Glenn was a co-owner of a night club in Hollywood called Goldfingers. The club had a James Bond theme.
Glenn guest starred in 75 episodes of Roseanne as Becky's boyfriend (and later husband), Mark Healy.
Glenn is interred at Forest Lawn-Cypress Cemetary in Orange County, California. He rests in lot 7324, space 2a, in the plot named Garden of Protection.
Roseanne co-worker, Michael Fishman, instituted a Glenn Quinn Memorial Fund to relieve Glenn's family of the financial burden of Glenn's funeral expenses. Michael Fishman requested that the fans help show support to Glenn's family by contributing to the fund.
Glenn supported the UCLA Jonsson Cancer Center Foundation. He requested that all gifts for him would be sent to this charity.
Glenn smoked the common filtered variety of Marlboro cigarettes often called "reds" for the red packaging.
Glenn taught David Boreanaz how to play the drums.
Glenn took co-star David Boreanaz and David's then wife, Ingrid Quinn (no relation to Glenn), on holiday during a 2 week break in production in the summer of 1999.
Glenn was a waiter at Jerry's Famous Deli in Studio City, California before he became an actor.
Glenn had two tattoos. He had one on his right shoulder that read "Erin Go Bragh" (Ireland Forever) and a harp on his left shoulder (a traditional Irish symbol).
Glenn Quinn: Doyle's an intense character. Doyle's trying to atone for his own past and he has to help Angel-but he doesn't want to become too involved. On one hand, here he is preaching to Angel to get involved with humans and really care about them, but meanwhile Doyle would rather be at the track betting the ponies and drinking.
Glenn Quinn: Not to sound egomaniac or anything, but just to get under people's skin like that, and for them to believe in you and believe strongly enough to write... it's flattering and it helps you during the day.
Glenn Quinn: When they first cast me, I was a pretty avid fan and vampire movies and Celtic mythology, so I was excited to get a chance to walk in Doyle's shoes and have fun with it.
Glenn Quinn: There's a lot of Doyle in me. I don't know where I begin and Doyle ends or where Doyle begins and I end.
Glenn Quinn: When you get to speak Irish, you become more at one with yourself, you kind of have a spark when you use it, and I think it's a great dialect. When they first cast me, I was a pretty avid fan of vampire movies and Celtic mythology, so I was excited to get a chance to walk in Doyle's shoes and have fun with it.