John O'Brien

    Known For

    Acting

    John O'Brien

    Biography

    We don't have a biography for John O'Brien

    Known For

    • Grey's Anatomy

      Grey's Anatomy

      2005

    • Friends

      Friends

      1994

    • Malcolm in the Middle

      Malcolm in the Middle

      2000

    • Criminal Minds

      Criminal Minds

      2005

    • Two and a Half Men

      Two and a Half Men

      2003

    • The X-Files

      The X-Files

      1993

    • Shameless

      Shameless

      2011

    • Pretty Little Liars

      Pretty Little Liars

      2010

    • 9-1-1

      9-1-1

      2018

    • NCIS

      NCIS

      2003

    • Scrubs

      Scrubs

      2001

    • Desperate Housewives

      Desperate Housewives

      2004

    • Community

      Community

      2009

    • Victorious

      Victorious

      2010

    • S.W.A.T.

      S.W.A.T.

      2017