- Parents immigrated to the U.S. from Ireland before he was born, but he spent most of his childhood split between Illinois and Ireland.
- Trained at the Piven Theatre Workshop in Evanston, IL, run by Jeremy Piven's father, Byrne, and made his stage debut opposite Byrne Piven in 1979 in The Man in 605.
- Made his film debut in the 1984 drama Reckless, but made his name a year later in Desperately Seeking Susan and the TV-movie An Early Frost.
- The 1998 romantic drama This Is My Father starred Aidan, was written and directed by his brother Paul, with cinematography by brother Declan and featured a cameo by his sister Marian.
- Brother-in-law of actress Lorraine Bracco.
- Works with several autism-related organizations; his daughter, Ava, was diagnosed with the disorder when she was a toddler.
- 2000, Sundance Film Festival — Special Jury Prize for Outstanding Ensemble Performance (Dramatic): Winner
- 1986, Emmy — Outstanding Lead Actor in a Miniseries or Special: Nominee
- 2007, Emmy — Outstanding Supporting Actor in a Miniseries or a Movie: Nominee
- Paul Quinn — Brother
- Ava Eileen Quinn — Daughter
- Declan Quinn — Brother
- Teresa Quinn — Mother
- Michael Quinn — Father
- Elizabeth Bracco — Wife
- Mia Quinn — Daughter
- Marian Quinn — Sister
- Robert Quinn — Brother
- DePaul University, Chicgao, IL (BFA in Acting)
Season 9, Episode 4
- Birth Place: Chicago, IL
- Birthday: March 8, 1959, Pisces
- Profession: Actor
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