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John O'Brien

ACTOR

John O'Brien

58 credits since 1993

TenseSuspensefulRomanticDarkWorkplace

See the filmography

In the pictureGrey's Anatomy

ABOUT JOHN

There’s no biography for John O'Brien yet.

Known forActing

On Cineora55 of 58 titles

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John O'Brien elsewhere

IMDb
Wikidata

Known for

The titles people know John from.

Grey's Anatomy poster

Series

2005–IMDb7.6

Pretty Little Liars poster

Series

Pretty Little Liars

2010–2017IMDb7.3

The Last Heist poster

Movie

2016IMDb3.6

Career

IMDb rating of each title on Cineora, by year.

Titles on Cineora: 55
Average IMDb: 7.2
Highest rated: The West WingIMDb 8.9
Working since: 1993

Size: how widely seen

Filmography

58 credits

The 2020s

5 titles · IMDb 6.0 on average

Not on Cineora

Good Grief

2024

as Dan

Cheaper by the Dozen poster

Movie

Cheaper by the Dozen

2022IMDb4.6

as Principal

This Game's Called Murder poster

Movie

This Game's Called Murder

2021IMDb3.5

as Man in Suit

Hacks poster

Series

2021–2026IMDb8.3

as Duncan · 1 episode

Perry Mason poster

Series

2020–2023IMDb7.6

as Ernie Magnuson · 1 episode

The 2010s

22 titles · IMDb 7.0 on average

Bob Hearts Abishola poster

Series

Bob Hearts Abishola

2019–2024IMDb7.1

as James · 1 episode

Dirty John poster

Series

2018–2020IMDb7.3

as Cameron Scott · 2 episodes

Light as a Feather poster

Series

Light as a Feather

2018–2019IMDb6.5

as Reverend Fahey · 2 episodes

9-1-1 poster

Series

2018–IMDb7.8

as Rod Billings · 1 episode

S.W.A.T. poster

Series

2017–2025IMDb7.2

as Weber · 1 episode

The Last Heist poster

Movie

2016IMDb3.6

as Manager Mark

Superstore poster

Series

2015–2021IMDb7.8

as Mike · 1 episode

Mortdecai poster

Movie

2015IMDb5.5

as Butler

The 2000s

20 titles · IMDb 7.6 on average

Community poster

Series

2009–2015IMDb8.5

as Chaplin · 1 episode

Eleventh Hour poster

Series

2008–2009IMDb7.2

as Manager · 1 episode

The Middleman poster

Series

2008IMDb8.0

as Newscaster · 1 episode

Chuck poster

Series

2007–2012IMDb8.2

as Older CIA Tech · 1 episode

Mad Men poster

Series

2007–2015IMDb8.7

as Phil Kennedy · 1 episode

Flicka poster

Movie

2006IMDb6.0

as Mr. Masterson

Ugly Betty poster

Series

2006–2010IMDb6.8

as Joe of Happy Homes · 1 episode

Criminal Minds poster

Series

2005–IMDb8.1

as Dr. Meyer · 1 episode

The 1990s

11 titles · IMDb 7.5 on average

BeastMaster poster

Series

1999–2002IMDb6.2

as Village leader · 1 episode

The West Wing poster

Series

1999–2006IMDb8.9

as Reporter · 1 episode

Will & Grace poster

Series

1998–2006IMDb7.4

as Salesperson · 1 episode

Not on Cineora

Mom, Can I Keep Her?

1998

as Nigel

Ally McBeal poster

Series

1997–2002IMDb6.9

as Waiter · 1 episode

The Practice poster

Series

1997–2004IMDb7.7

as Foreman · 1 episode

Not on Cineora

Isle of Lesbos

1997

as Farmer

Clueless poster

Series

1996–1999IMDb5.9

as Zombie · 1 episode

Often works with

The people who keep turning up in John’s titles.

David E. KelleyCreator · Boston Legal, Ally McBeal and 2 more

Chuck LorreCreator · Two and a Half Men, Mom and 1 more

Allison JanneyThe West Wing and Mom

Connie Britton9-1-1 and Dirty John

James SpaderBoston Legal and The Practice

Zachary LeviChuck and Less than Perfect

Rhona MitraBoston Legal and The Practice

Shemar MooreCriminal Minds and S.W.A.T.

Judith LightUgly Betty and Transparent

Zach BraffScrubs and Cheaper by the Dozen