
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.

Crime 101
2026 · as Detective Fellner

Mission: Impossible III
2006 · as Party Goer

Olympus Has Fallen
2013 · as Ray Monroe

Babylon
2022 · as Studio Executive (Billy)

The Princess Diaries
2001 · as Patrick O'Connell

London Has Fallen
2016 · as NSA Deputy Director Ray Monroe

Crimson Tide
1995 · as Phone Talker

Yes Man
2008 · as Ted

Searching
2018 · as Radio Jockey

Vantage Point
2008 · as Cavic

Phenomenon
1996 · as Banes

Missing
2023 · as Radio Host

Mother's Day
2016 · as Male Cop

Chaplin
1992 · as Lewis Seeley

Deck the Halls
2006 · as Mayor Young

Heart and Souls
1993 · as John McBride

Big Fat Liar
2002 · as Leo

Raising Helen
2004 · as Paul Davis