Acting
John O'Brien
Department: Acting
Known For
Prominent works featuring John O'Brien
TV
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Grey's Anatomy
2005
TMDB4.1
TV
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Friends
1994
TMDB4.2
TV
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Criminal Minds
2005
TMDB4.2
TV
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NCIS
2003
TMDB3.8
TV
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Malcolm in the Middle
2000
TMDB4.3
TV
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Shameless
2011
TMDB4.1
TV
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The X-Files
1993
TMDB4.2
TV
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Two and a Half Men
2003
TMDB3.7
TV
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9-1-1
2018
TMDB4.1
TV
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Pretty Little Liars
2010
TMDB4.0
Filmography & Credits
Complete career catalog (60 titles)
| Poster | Title | Character / Role | Type | Year |
|---|---|---|---|---|
 | Good Grief | Dan | Movie | 2024 |
 | Cheaper by the Dozen | Principal | Movie | 2022 |
 | This Game's Called Murder | Man in Suit | Movie | 2021 |
 | Hacks | Duncan | TV Series | 2021 |
 | Perry Mason | Ernie Magnuson | TV Series | 2020 |
 | Bob Hearts Abishola | James | TV Series | 2019 |
 | Dirty John | Cameron Scott | TV Series | 2018 |
 | Light as a Feather | Reverend Fahey | TV Series | 2018 |
 | 9-1-1 | Rod Billings | TV Series | 2018 |
 | S.W.A.T. | Weber | TV Series | 2017 |
 | The Last Heist | Manager Mark | Movie | 2016 |
 | Superstore | Mike | TV Series | 2015 |
 | Mortdecai | Butler | Movie | 2015 |
 | Transparent | Professor | TV Series | 2014 |
 | Young & Hungry | Mr. Klepfer | TV Series | 2014 |
 | The Crazy Ones | Larry | TV Series | 2013 |
 | Mom | Waiter | TV Series | 2013 |
 | The Mindy Project | Dr. Jones | TV Series | 2012 |
 | Don't Trust the B---- in Apartment 23 | Tom | TV Series | 2012 |
 | Being Flynn | Airline Pilot | Movie | 2012 |
 | Austin & Ally | Mr. Neidermeyer | TV Series | 2011 |
 | Workaholics | Doctor | TV Series | 2011 |
 | Shameless | Father Monroe | TV Series | 2011 |
 | Law & Order: LA | Scott Hancox | TV Series | 2010 |
 | Better With You | Florist | TV Series | 2010 |
 | Pretty Little Liars | Principal Hackett | TV Series | 2010 |
 | Victorious | Mr. Mooney | TV Series | 2010 |
 | Community | Chaplin | TV Series | 2009 |
 | Eleventh Hour | Manager | TV Series | 2008 |
 | The Middleman | Newscaster | TV Series | 2008 |
 | Chuck | Older CIA Tech | TV Series | 2007 |
 | Mad Men | Phil Kennedy | TV Series | 2007 |
 | Flicka | Mr. Masterson | Movie | 2006 |
 | Ugly Betty | Joe of Happy Homes | TV Series | 2006 |
 | Criminal Minds | Dr. Meyer | TV Series | 2005 |
 | Grey's Anatomy | Lab Tech Jeffrey | TV Series | 2005 |
 | Medium | Hotel Clerk | TV Series | 2005 |
 | Desperate Housewives | Dr. Wheeler | TV Series | 2004 |
 | Boston Legal | Clerk #2 | TV Series | 2004 |
 | NCIS | Bruce | TV Series | 2003 |
 | Two and a Half Men | Waiter | TV Series | 2003 |
 | Less than Perfect | Executive | TV Series | 2002 |
 | What I Like About You | Dr. Thompson | TV Series | 2002 |
| What I Like About You | Minister | TV Series | 2002 |
 | Monk | Maitre'd | TV Series | 2002 |
 | Enough | Front Desk Clerk | Movie | 2002 |
 | Scrubs | Man | TV Series | 2001 |
 | Malcolm in the Middle | Sales Clerk | TV Series | 2000 |
 | BeastMaster | Village leader | TV Series | 1999 |
 | The West Wing | Reporter | TV Series | 1999 |
 | Will & Grace | Salesperson | TV Series | 1998 |
| Will & Grace | Man | TV Series | 1998 |
 | Mom, Can I Keep Her? | Nigel | Movie | 1998 |
 | Ally McBeal | Waiter | TV Series | 1997 |
 | The Practice | Foreman | TV Series | 1997 |
 | Isle of Lesbos | Farmer | Movie | 1997 |
 | Clueless | Zombie | TV Series | 1996 |
 | The Drew Carey Show | Rick | TV Series | 1995 |
 | Friends | Airline Employee | TV Series | 1994 |
 | The X-Files | Missionary #2 | TV Series | 1993 |