Dan O'Brien

Dan O'Brien

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.

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Known For

Grey's Anatomy

Grey's Anatomy

2005 • as Keith Gardner

Gunslingers

Gunslingers

2025 • as Josh

Law & Order

Law & Order

1990 • as Delray

How I Met Your Mother

How I Met Your Mother

2005 • as Meeker

American Housewife

American Housewife

2016 • as Daniel

Whitney

Whitney

2011 • as Mark

Filmography

2025

Descendent
Descendent
Movie - Released: 3/8/2025
Gunslingers
Gunslingers
as Josh
Movie - Released: 4/11/2025

2018

Occupant
Occupant
as Frank
Movie - Released: 11/25/2018

2017

Brand New Old Love
Brand New Old Love
as Thom
Movie - Released: 8/1/2017

2016

American Housewife
American Housewife
as Daniel
TV - Released: 10/11/2016

2015

Astraea
Astraea
as James
Movie - Released: 2/27/2015

2011

Whitney
Whitney
as Mark
TV - Released: 9/22/2011

2005

How I Met Your Mother
How I Met Your Mother
as Meeker
TV - Released: 9/19/2005
Grey's Anatomy
Grey's Anatomy
as Keith Gardner
TV - Released: 3/27/2005

1990

Law & Order
Law & Order
as Delray
TV - Released: 9/13/1990

Unknown

Movie
The Delray Story
as Delray
Movie