Keir O'Donnell

• Name — Keir O'Donnell • Occupation — Actor • Years Active — 2002–present

O'Donnell attended high school at The Bromfield School, and was involved in numerous productions both on the festival circuit and in community theater. In 1996, he was awarded a Massachusetts High School Drama Guild Acting Scholarship. Upon graduation he joined the first class of the newly created four-year classical theatre acting conservatory at The Hartt School in Hartford, Connecticut. The Hartt School of Theatre was established by Malcolm Morrison and Alan Rust (North Carolina School of the Arts). At the Hartt School he performed in numerous plays including Three Sisters, Lysistrata, Twelfth Night, Philadelphia Here I Come, and played Romeo in Romeo and Juliet opposite Hannah Mello. He graduated in 2000 and was accepted to the Hartford Stage Co. Regional Theatre, where he appeared in Macbeth and A Christmas Carol. In the fall of 2001 he was cast as a lead in the U.S. premiere of The Man Who Never Yet Saw Woman's Nakedness by Moritz Rinke, at The Odyssey Theatre in West Los Angeles.

O'Donnell made guest appearances on Lost, CSI, The Closer, and United States of Tara. He made several appearances on the first season of the FX series Sons of Anarchy. He appeared in an episode of It's Always Sunny in Philadelphia, which aired on 2 October 2008. He was part of the ensemble cast of the short-lived ABC documentary-style dramedy, My Generation (2010), developed by Noah Hawley, and later had recurring roles on Hawley's other series Fargo and Legion. In 2011, he had a recurring role on the Showtime series United States of Tara, appearing for the second half of the third season as Evan, Kate's love interest. In 2013, he made a guest appearance on NCIS playing Ramsey Boone.

• Year — Title — Role — Notes • 2004 — 8 Simple Rules — Derek — Episode: "Mall in the Family" • Lost — Thomas — Episode: "Raised by Another" • 2005 — Killer Instinct — Chester — Episode: "Shake, Rattle, and Roll" • 2006 — CSI: Crime Scene Investigation — Ken Richmond — Episode: "Up in Smoke" • The — Gerald Curtis — Episode: "No Good Deed" • Introducing Lennie Rose — Harper — TV film • 2007 — It's a Mall World — Dennis — TV miniseries • 2008 — It's Always Sunny in Philadelphia — Jan — Episode: "Mac and Charlie Die: Part 2" • Sons of Anarchy — Lowell Harland Jr. — Recurring role • 2009 — FlashForward — Ned Ned — Episode: "Black Swan" • 2010 — Ghosts/Aliens — Mike Stevens — TV film • My Generation — Kenneth Finley — Main role • 2011 — United States of Tara — Evan — Recurring role • 2012 — The — Daniel Flynn — TV film • Law & Order: Special Victims Unit — Stuart — Episode: "Street Revenge" • 2013 — NCIS — Ramsey Boone — Episode: "Prime Suspect" • Californication — Beckett Fetch — Episode: "Blind Faith" • Maron — Matt — Episode: "Mexican Angel" • 2014 — Rizzoli & Isles — Craig Johnson — Episode: "Tears of a Clown" • 2015 — Masters of Sex — Vincent — Episode: "Two Scents" • Fargo — Ben Schmidt — Recurring role • 2016 — The — Niccolò Machiavelli / John Wilkes Booth — Episodes: "Mona Lisa" & "Lincoln" • 2017 — Sun Records — Dewey Phillips — TV series • 2017–2018 — Ray Donovan — George Winslow — Recurring (season 5) • 2017–2019 — Legion — Daniel — 3 episodes • 2018 — Drunk History — Mullen — Episode: "Death" • 2019 — Into the Dark — Larry Adams — Episode: "I'm Just F*cking With You" • 2020 — Project Blue Book — Evan Blake — 4 episodes • 2023 — High Desert — Stewart — 2 episodes • 2024 — FBI: Most Wanted — William Barlowe — Episode: "Powderfinger" • Mayor of Kingstown — Macon — Episode: "Rag Doll"

The authorities additionally record the heading Keir Odonnell. His recorded language was English.

After several student and independent films, O'Donnell landed the role of Todd Cleary in Wedding Crashers. The film went on to become the highest grossing R-rated comedy of all time. Not long after Crashers, Vince Vaughn invited O'Donnell to join him on the road for his Wild West Comedy Tour, a tour that hit 30 cities in 30 days across the country. O'Donnell would appear on stage with Vaughn as a special guest doing improv skits. The tour was filmed and can be seen as the documentary: Vince Vaughn's Wild West Comedy Show. In 2002, he played the role of Todd Jarvis in the movie Splat!, a troubled teen who played paintball to help him succeed. O'Donnell re-teamed with Vaughn for The Break-Up. O'Donnell costarred in the indie comedy Flakes with Zooey Deschanel, which premiered at the 2007 South By Southwest Film Festival. O'Donnell also appeared in Henry Bean's film Noise, which was featured at the 2008 Toronto Film Festival. He appeared as the villain Veck Simms in Paul Blart: Mall Cop and appeared in the 2010 romantic comedy, When in Rome, with Kristen Bell and Josh Duhamel. The same year he had a cameo in The Mother of Invention. O'Donnell had his directorial debut in 2024, with Marmalade.

• Year — Title — Role — Notes • 2002 — In Your Face — Todd Jarvis • 2004 — Starkweather — Bob Von Buch • 2005 — Wedding Crashers — Todd Cleary • 2006 — The — Paul Grant • 2007 — Flakes — Stuart • What We Do Is Secret — Chris Ashford • After Sex — David • Deadbox — Tucker • 2008 — Bar Starz — Dick • Pathology — Ben Stravinsky • Amusement — The Laugh • 2009 — Paul Blart: Mall Cop — Veck Simms • Taking Chances — Digger Morris • The — Tears of a Child Villain • 2010 — The — Rodney Bingenheimer • When in Rome — Father Dino • Miss Nobody — L.J. Feffer • 2012 — Free Samples — Danny • Complacent — Thomas Pulchek • 2013 — Worm — Dustin (voice) • A — Eliot — Also writer & producer • 2014 — Dawn of the Planet of the Apes — Finney • American Sniper — Jeff Kyle • 2015 — Return to Sender — Tony Desantos • 2016 — Incarnate — Oliver • 2017 — Gifted — Bradley Pollard • Heart, Baby — Randy • 2020 — The Dry — Greg Raco • 2022 — Ambulance — FBI Agent Anson Clark • 2024 — Marmalade — Writer & director • 2025 — Coyotes — Exterminator