Although he separated from Ellen Barkin in 1993, he did not file for divorce until May 1999.
Autobiography titled "Pictures in My Head"
Before becoming an actor, he was an archaelogist, a schoolteacher, a short-order cook, and a bullfighter.
Cites Federico Fellini's Amarcord (1973) as one of his all-time favorite movies.
Educated by the Christian Brothers in Dublin.
Has a son, Jack Daniel, born 1989; and a daughter, Romey Marion, born 1992.
Has appeared in 3 roles romantically opposite Laura Linney, "A Simple Twist of Fate," "P.S." and "Jindabyne.".
He has Irish and US citizenship.
He was a football played with the Stella Maris Football Club in Drumcondra, Dublin.
He went from a priest in Stigmata (1999) to Satan in End of Days (1999).
He's a patron of The West of Ireland Cardiology Foundation, Croi, since 1997.
In a November 1999 interview with the New York Post, he claimed to have been molested by his Latin teacher while at an English seminary preparing for priesthood.
Learned to speak Gaelic in college and still speaks it fluently.
Older brother of Donal, Thomas, Breda, Margaret and Marian (deceased).
Son of Dan Byrne and Eileen Gannon.
Speaks English and Gaeilge (Irish Gaelic).
Started acting at the age of 29 and he went to America for the first time when he was 37.
Was nominated for Broadway's 2000 Tony Award as Best Actor (Play) for a revival of Eugene O'Neill's "A Moon for the Misbegotten."