Let's make this birthday one to remember.

61 years old (Born on October 31, 1963)

American actor; He is famous from Young Guns.

Played the cello on the score to Mission: Impossible III (2006). Born on the same day as actor/comedian Rob Schneider. Was a member of Phi Gamma Delta fraternity at Northwestern University. Sister Moira works in the Philadelphia DA's office as an assistant district attorney. Mulroney has been married to actress Catherine Keener since 1990. They met in 1987 when filming Survival Quest (1989).

Plays in a band called the Cranky George Trio.

Good friends with actress Julia Roberts.

Brother-in-law of Elizabeth Keener.

He and his older brother Sean are co-owners of 'The Double Door', one of Chicago's more popular music clubs.

Graduated from Northwestern University in 1985, where he attended the School of Speech.

Plays double bass and cello on the debut EP of Rain and Summer Phoenix's band, Papercranes.

Attended "TC Williams High School", which later became the setting of a Disney movie with Denzel Washington.

Is of predominantly Irish ancestry. All of his siblings have traditional Irish names

Plays cello in the song "Place Your Mind" from Melissa Etheridge's 1992 Album "Never Enough".

Mulroney's younger brother Kieran Mulroney is also an actor. The brothers starred together in the John Hughes comedy, Career Opportunities (1991) with Jennifer Connelly and Frank Whaley.

First child born, with Catherine Keener, a son named Clyde. [June 1999]

Good friends with Brad Pitt.

He is sometimes confused with actor Dylan McDermott; there is a slight resemblance and a similar sounding name.

Lives in Los Angeles.

Was in a band called 'The Low & Sweet orchestra'.