
Dermot Patrick Mulroney (born October 31, 1963) is an American actor and musician. He is known for his roles in romantic comedy, western, and drama films.
Mulroney is known for his work in various films such as Long Gone (1987), Young Guns (1988), Staying Together (1989), Where the Day Takes You (1992), Point of No Return (1993), The Last Outlaw (1993), Angels in the Outfield (1994), My Best Friend's Wedding (1997), About Schmidt (2002), The Wedding Date (2005), Zodiac (2007), August: Osage County (2013), Insidious: Chapter 3 (2015), Scream VI, and Anyone but You (2023).
Mulroney played the main antagonist Francis Gibson in NBC's Crisis (2014), Dr. Walter Wallace in Pure Genius (2016–2017), Sean Pierce in Showtime's Shameless (2015–2017), and Bobby Sheridan in USA's The Purge (2018–2019).

Zodiac
2007 · as Martin Lee

Scream VI
2023 · as Detective Bailey

Anyone but You
2023 · as Leo

Ruthless
2023 · as Harry Sumner

Burn After Reading
2008 · as Star of "Coming Up Daisy"

Point of No Return
1993 · as J. P.

Insidious: Chapter 3
2015 · as Sean Brenner

Dirty Grandpa
2016 · as David Kelly

Night Patrol
2026 · as Sarge

The Grey
2012 · as Jerome Talget

Abduction
2011 · as Martin Price

Along for the Ride
2022 · as Robert West

Bad Girls
1994 · as Josh McCoy

Careful What You Wish For
2015 · as Eliott Harper

Young Guns
1988 · as Dirty Steve Stephens

The Family Stone
2005 · as Everett Stone

Career Opportunities
1991 · as Nestor Pyle

The Courier
2019 · as Special Agent Roberts