John O'Brien
57 acting credits
Acting · 57
Grey's Anatomy
2005
NCIS
2003
Criminal Minds
2005
S.W.A.T.
2017
Shameless
2011
Friends
1994
Desperate Housewives
2004
Two and a Half Men
2003
9-1-1
2018
The X-Files
1993
Medium
2005
Monk
2002
The West Wing
1999
Malcolm in the Middle
2000
Scrubs
2001
Mad Men
2007
Will & Grace
1998
Boston Legal
2004
Mom
2013
The Practice
1997
Pretty Little Liars
2010
The Drew Carey Show
1995
Hacks
2021
Community
2009
Chuck
2007
Ugly Betty
2006
The Mindy Project
2012
Superstore
2015
Victorious
2010
Ally McBeal
1997
Law & Order: LA
2010
Workaholics
2011
Perry Mason
2020
What I Like About You
2002
Bob Hearts Abishola
2019
Austin & Ally
2011
Transparent
2014
Dirty John
2018
Don't Trust the B---- in Apartment 23
2012
Less than Perfect
2002
Clueless
1996
Young & Hungry
2014
BeastMaster
1999
Eleventh Hour
2008
The Crazy Ones
2013
The Middleman
2008
Better With You
2010
Light as a Feather
2018
Enough
2002
Cheaper by the Dozen
2022
Flicka
2006
Being Flynn
2012
The Last Heist
2016
This Game's Called Murder
2021
Mom, Can I Keep Her?
1998
Good Grief
2024
Isle of Lesbos
1997