Dan O'Brien

Actor 1990–2025 (35 year career)

6.3 avg rating

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.

Known For

Film

Gunslingers

Josh

Film

Grey's Anatomy

Keith Gardner

Film

Descendent

Christian

Film

Whitney

Mark

Film

How I Met Your Mother

Meeker

Film

Law & Order

Delray

Film

The Affair

Seth

Film

American Housewife

Daniel

Filmography

Acting (12)

Movies (6)

Gunslingers

as Josh

Descendent

as Christian

Occupant

as Frank

Brand New Old Love

as Thom

Astraea

as James

The Delray Story

as Delray

5.0

Television (6)

American Housewife

as Daniel

The Affair

as Seth

Whitney

as Mark

Grey's Anatomy

as Keith Gardner

How I Met Your Mother

as Meeker

Law & Order

as Delray