Dan O'Brien

Acting

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

8.2

Grey's Anatomy

2005 · Series · Keith Gardner

8.1

How I Met Your Mother

2005 · Series · Meeker

5.2

Whitney

2011 · Series · Mark

5.7

Descendent

2025 · Christian

7.3

Law & Order

1990 · Series · Delray

6.7

The Affair

2014 · Series · Seth

7.7

American Housewife

2016 · Series · Daniel

6.0

Occupant

2018 · Frank

6.0

Astraea

2015 · James

6.2

Gunslingers

2025 · Josh

3.9

Brand New Old Love

2017 · Thom

All acting credits

6.2