Played cello in Melissa Etheridge's track of "Place Your Hand" which was included in her 1992 album, "Never Enough," and he previously had played this musical instrument in school also city youth orchestras as a kid.

Had a recurring role as Gavin Mitchell in "Friends" (1994-2004) during January 2003.

Was the associate producer of "Living in Oblivion" (1995) in which he also starred together with his wife, Catherine Keener.

Composed a song entitled "Someone Else's Used Guitar" for "The Thing Called Love" (1993) and also was the uncredited singer in the film.

Was honored a Golden Space Needle Award by Seattle International Film Festival for winning the Best Actor category in 1992.

Joined the audition for the role of Billy Campbell in "Melrose Place" (1992-1999).

Starred together with his younger brother, Kieran Mulroney, in "Career Opportunities" (1991).

Played double bass and cello in Papercranes' first EP.

Was Phi Gamma Delta fraternity's member when he attended Northwestern University.

Is often mistaken for Dylan McDermott due to his slight resemblance and similar sounding name with the fellow actor.

Has the same birthday with funnyman Rob Schneider.

Is a good friend of Brad Pitt.

Joined a band named The Low & Sweet Orchestra.

Is the co-owner of The Double Door, a popular music club in Chicago.