Sean Michael O'Bryan (born September 10, 1963) is an American film and television actor. He co-starred with William Ragsdale on the short-lived series Brother's Keeper. Early television work includes guest roles on television series in Married... with Children, MacGyver, Northern Exposure, Cold Case, Diagnosis: Murder, Quantum Leap, Murder, She Wrote, Chicago Hope, Roswell, Roseanne, Criminal Minds, The King of Queens and Dexter. More recent television guest star credits include CSI, Bones, Melissa & Joey, Lie to Me, Hot In Cleveland, The Mentalist, Leverage, Glee, NCIS: LA, Superstore, and 9-1-1: Lone Star. He's had recurring roles on TV series including  the sitcom Pig Sty, Six Feet Under, Abby, The Middle, and Love, Victor. He had a major recurring role as Bill Blackham on Persons Unknown. His film credits include Chaplin, Crimson Tide, Phenomenon, Exit to Eden, Out to Sea, Big Fat Liar, Deck the Halls, I'll Be Home For Christmas, Yes Man, Vantage Point, both Princess Diaries films, Playing for Keeps, Olympus Has Fallen, London Has Fallen, Table 58, Mother's Day, Searching, and Rust Creek.

Filmography

• 2026Crime 101 — Detective Fellner
• 2026Steakout! — Sean
• 2026The End
• 2025Bad Painter — Steven / Gallerist
• Good American Family — Judge Huss
• 2025I Am Gitmo — General Geoffrey Miller
• 2025Traumatika — John Reed
• 2024Nyctophobia — Thomas
• 2024Purgatory Station — Freddie Shade
• 2024Revv
• 2024The Christmas Letter — Tigger Woods
• 2023Missing — Radio Host
• 2023Shift — Hal
• 2023The Veil — Douglas
• 2022Babylon — Studio Executive (Billy)
• Kenan — Dean
• 9-1-1: Lone Star — Minefeld Owner
• 2020Jumping the Gun
• Love, Victor — Father Lawrence
• 2020Murder at the Mansion — Chandler
• 2020The Stand at Paxton County — Vin Scurlock
• 2019Rust Creek — Sheriff O'Doyle
• The Unicorn — Jim
• 9-1-1 — Charlie Nash
• 2018Christmas Break-In — Pete
• 2018Searching — Radio Jockey
• 2017Beatriz at Dinner — Security Guard
• 2017First Night — Hitman
• The Real Bros of Simi Valley — Jeff & Sandy's Friend
• 2016Get a Job — Alan Fredricks (Wilheimer Client)
• 2016London Has Fallen — NSA Deputy Director Ray Monroe
• 2016Mother's Day — Male Cop
• Marvel's Agent Carter — Andrew Henry
• Superstore — Ted
• 2015Table 58 — Coach Peterson
• 2015The House Sitter — Kyle Lawrence
• 2015Whitney — Hotel Manager
• 2014Dawn Patrol — Mace
• Murder in the First — Sam Rydell
• 2013Heaven — Clerk
• 2013Olympus Has Fallen — Ray Monroe
• 2012Playing for Keeps — Coach Jacob
• 2011Cinema Verite — Johnny Hall
• 2011New Year's Eve — Pastor Edwin
• Shameless — George
• Workaholics — Dave
• Good Luck Charlie — Mr. Hammerstone
• Hot in Cleveland — Andy
• Persons Unknown — Bill Blackham
• FlashForward — Father Seabury
• Glee — Roric
• 2009Hatching Pete — Leon Ivey
• Lie to Me — Tom McHenry
• NCIS: Los Angeles — Gavin Teed
• The Middle — Ron Donahue
• Leverage — Kip Bryden
• 2008Player 5150 — Jerry
• The Mentalist — Emmett Fitzgerald
• 2008Vantage Point — Cavic
• 2008Yes Man — Ted
• Private Practice — Dave Walker
• 2006Deck the Halls — Mayor Young
• Dexter — Dan Mendell
• In Justice — Clark Sanders
• 2006Mission: Impossible III — Party Goer
• Bones — Mike Shenfield
• Criminal Minds — Vincent Stiles
• Ghost Whisperer — David Miller
• 2004A Place Called Home — Dave
• Center of the Universe — Gary
• 2004Raising Helen — Paul Davis
• Abby — Roger Tomkins
• Las Vegas — Bill
• NCIS — David Shields
• 2002Big Fat Liar — Leo
• Without a Trace — Jeremy Burton
• Crossing Jordan — Jake Gerloff
• Grounded for Life — Paul Ferris
• Six Feet Under — Tom Wheeler
• 2001The Princess Diaries — Patrick O'Connell
• CSI: Crime Scene Investigation — Reverend Rebetti
• Family Law — Greg Philner
• Jack & Jill — Stan, Jill's co-worker
• 1999Nice Guys Sleep Alone — Carter
• Providence — Dr. Rick Rozelli
• Roswell — Warren Turner
• Becker — Randy
• Brother's Keeper — Bobby Waide
• Felicity — Paul
• 1998I'll Be Home for Christmas — Max
• The King of Queens — Marc
• Two Guys and a Girl — Ted
• Jenny — Ethan
• 1997Out to Sea — Allan
• 1996Dear God — Undercover Cop
• 1996Mary & Tim
• 1996Phenomenon — Banes
• The Pretender — Bradley DuMonte
• 1996The Twilight of the Golds — Steven
• 1995Crimson Tide — Phone Talker
• 1995Here Come the Munsters — Detective Cartwell
• JAG — Andy Watson
• Pig Sty — Joe 'Iowa' Dantley
• The Drew Carey Show — Dean
• Chicago Hope — Flight Attendant Ken
• 1994Exit to Eden — Tommy Miller
• Touched by an Angel — Jake Monroe
• 1994Trapped in Paradise — Dick Anderson
• Diagnosis: Murder — Dave Caine
• 1993Heart and Souls — John McBride
• 1993Marked for Murder
• 1992Chaplin — Lewis Seeley
• Baby Talk
• 1991Frankie and Johnny — Bobby
• Sibs — Luke
• The Legend of Prince Valiant
• Beverly Hills, 90210 — Charlie Dixon
• Northern Exposure — Kenny
• Quantum Leap — Phillip Ashcroft
• Married... with Children — Neuter
• Heart of the City
• MacGyver — Willie
• Murder, She Wrote — Charlie D. McCumber, Paul Hampton, Steve Burke
• The First Circle — Hearn

Appearances as themselves (1)

• 2025My Movie Starring Paul Dano — Self Tape Audition