Dan O'Brien
Acting
Biography
Dan O'Brien is an actor, known for Whitney (2011), Grand Theft Auto IV (2008) and The Delray Story (2011). He graduated from the University of Notre Dame in 1999.
Also known as
Daniel G. O'Brien
Latest News
Known For
8.2
Grey's Anatomy
2005 · TV
7.3
Law & Order
1990 · TV
8.1
How I Met Your Mother
2005 · TV
6.7
The Affair
2014 · TV
7.7
American Housewife
2016 · TV
5.2
Whitney
2011 · TV
6.1
Gunslingers
2025 · Movie
5.7
Descendent
2025 · Movie
6.0
Astraea
2015 · Movie
3.9
Brand New Old Love
2017 · Movie
6.0
Occupant
2018 · Movie
5.0
The Delray Story
— · Movie
Filmography
2025
Descendent
Movie · Christian
5.7
2025
Gunslingers
Movie · Josh
6.1
2018
Occupant
Movie · Frank
6.0
2017
Brand New Old Love
Movie · Thom
3.9
2016
American Housewife
TV · Daniel
7.7
2015
Astraea
Movie · James
6.0
2014
The Affair
TV · Seth
6.7
2011
Whitney
TV · Mark
5.2
2005
How I Met Your Mother
TV · Meeker
8.1
2005
Grey's Anatomy
TV · Keith Gardner
8.2
1990
Law & Order
TV · Delray
7.3
—
The Delray Story
Movie · Delray
5.0