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Brian Hugh O'Neill is an American actor and voice actor who provided the voice of Gansu in one episode of Avatar: The Last Airbender.

Avatar: The Last Airbender credits[]


Character information: Gansu

Selected other credits[]

Television work[]


Other credits[]

Biographical information[]

Personal life[]

O'Neill is a singer, songwriter, and guitar/bass player for the band Minus Ted, which he founded with fellow Third Watch actor Skipp Sudduth. He also serves as an acting instructor at The New York Film Academy and The American Musical and Drama Academy.


O'Neill's first acting credit came in the 1994 film The Lost Words, followed by Bury the Evidence in 1998. In 2002, he wrote, directed, and starred in H.O.L.E.: The Disillusionment of Mike and Eva, before appearing in Three Long Years, Laws of Attraction, Chapter 27, and Brooklyn Rules. He appeared alongside J. K. Simmons in the 2008 film Burn After Reading and later appeared in The Bourne Legacy and East of Acadia in 2012 and 2013, respectively. In 2014, he appeared in two shorts, Cop Doc and The Parker, the latter of which he also directed.

O'Neill has also been a regular on television. His first appearance on the small screen came in 1998 when he appeared in one episode of Law & Order, which would be followed in subsequent years by appearances in a number of other series in the franchise. In 2000, he appeared in crime drama Third Watch and made multiple appearances in The Corner. He has since appeared in a number of other series, including Rescue Me, The Sopranos, Damages, The Good Wife, Person of Interest, Elementary, The Following, Believe, Madam Secretary, and Gotham.


  • 2004: Won a Julie Harris National Playwrighting Award for Grass Island[1]


  1. Brian Hugh O'Neill Full Biography. brianhughoneill.com. Retrieved on January 28, 2015.