Denis Patrick Seamus O'Hare (born January 16, 1962 in Kansas City, Missouri) is an American actor noted for his award-winning performances in theatre, television and film. On the theatre scene he's perhaps best known for his turns in Take Me Out, Assassins and Sweet Charity, while he's gained recognition on television as Ensemble Dark Horse Russell Edgington in the HBO show True Blood. He's also a frequent collaborator with Ryan Murphy, having appeared in seven incarnations of American Horror Storynote and Murphy's adaptation of The Normal Heart.
He is also known for his supporting roles in the films Charlie Wilson's War, Milk, Changeling and Dallas Buyers Club.
O'Hare is openly gay, marrying Hugo Blackwood in 2011. They have an adopted son together named Declan.
Appearances in American Horror Story (2011-present)
- American Horror Story: Murder House (2011) as Larry Harvey
- American Horror Story: Coven (2013-14) as Spalding
- American Horror Story: Freak Show (2015) as Stanley
- American Horror Story: Hotel (2015-16) as Liz Taylor
- American Horror Story: Roanoke (2016) as Elias Cunningham
- American Horror Story: Double Feature — Red Tide (2021) as Holden Vaughn
- American Horror Stories: Dollhouse (2022) as Mr. Van Wirt
- American Horror Story: NYC (2022) as Henry
- American Horror Story: Delicate (2023) as Dr. Hill
Film Roles
- 21 Grams (2001) as Dr. Rothberg
- Garden State (2004) as Albert
- A Mighty Heart (2007) as John Bussey
- Michael Clayton (2007) as Mr. Greer
- Charlie Wilson's War (2007) as Harold Holt
- Baby Mama (2008) as Dr. Manheim
- Changeling (2008) as Dr. Jonathan Steele
- Quarantine (2008) as Randy
- Milk (2008) as John Briggs
- The Proposal (2009) as Mr. Gilbertson
- Duplicity (2009) as Duke Monahan
- Edge of Darkness (2010) as Moore
- The Eagle (2011) as Lutorius
- J. Edgar (2011) as Albert S. Osborn
- Dallas Buyers Club (2013) as Dr. Sevard
- The Normal Heart (2014) as Hiram Keebler
- Lizzie (2018) as John Morse
- The Goldfinch (2019) as Lucius Reeve
- Infinite Storm (2022) as Dave
- A Quiet Place: Day One (2024)
Television Roles
- Law & Order (1993-2003) as various characters.
- Law & Order: Special Victims Unit (2000, 2013) as Jimmy Walp and Father Chris Shea.
- Law & Order: Criminal Intent (2008) as Father Chris Shea
- Brothers & Sisters (2007-09) as Travis March
- The Good Wife (2009-13) as Judge Charles Abernathy
- The Good Fight (2017-21)
- CSI: Miami (2009-10) as Evan Talbot
- True Blood (2010-12) as Russell Edgington
- The Comedians (2015) as Denis Grant
- This Is Us (2016-18) as Jessie
- American Gods (2021) as Týr/Dr. Tyrell
- The Nevers (2021) as Dr. Edmund Hague