Michael O'Neill stars in "Extant" on CBS as Alvin Sparks.

One of the most well-respected character actors working today, Michael O'Neill boasts a prolific resume in motion pictures, television and on the New York stage. The tall, distinguished actor consistently turns in memorable performances, from his recurring role as secret service agent Ron Butterfield, head of the presidential detail on the hit series "The West Wing," to the heartbreaking Mr. Pollard, Tobey Maguire's poetry-loving father, in the feature film "Seabiscuit." O'Neill has also appeared in a wide variety of other films that include "Dallas Buyers Club," "J. Edgar," "Green Zone," "Transformers," "Secondhand Lions," "Around the Bend," "Traffic," "The Legend of Bagger Vance," "The Mod Squad," "The Sunchaser," "Jennifer 8," "The Gun in Betty Lou's Handbag," "Lorenzo's Oil," "Sea of Love," "Ghost Story" and "Dancer, Texas Pop. 81."

Among his recurring roles on television were turns as Senator Roland Foulkes on Sundance Channel's "Rectify"; Hank Griffin on USA Network's "Necessary Roughness"; Mayor Ted Bennett on CBS's "Vegas"; Former NCIS Special Agent Riley McCallister on CBS's "NCIS"; Gary Clark on ABC's "Grey's Anatomy"; Herb Stanton on FOX's "Prison Break"; Ron Cheals on ABC's "The Unit"; Dr. Colbert on two hit series, "Boston Public" and "Ally McBeal"; Pete Burton for ABC's "The Nine"; and Richard Walsh on FOX's much lauded and popular "24."

Other television appearances include the shows "Rizzoli & Isles," "CSI: Miami," "Law & Order: LA," "Fringe," "Numb3rs," "Sons of Anarchy," "Ghost Whisperer," "Leverage," "The Mentalist," "Criminal Minds," "Without a Trace," "Cold Case," "Commander in Chief," "Crossing Jordan," "Carnivale," "Judging Amy," "NYPD Blue," "Chicago Hope," "Roswell," "JAG," "The X-Files," "The Pretender," "ER," "L.A. Law" and "Picket Fences," to name just a few. He has also starred in several TV movies, including CBS's "Plainsong" and "Beyond Betrayal"; USA Films' "Victim of Love: The Shannon Moore Story"; HBO's "Norma Jean & Marilyn" and "Blind Justice"; and ABC's "For Their Own Good," as well as the miniseries "The Shining."

O'Neill was born and raised in Montgomery, Alabama, and attended Auburn University, where he earned his bachelor of science in economics. After graduating he moved to New York, where he continued his studies and landed his first job performing in "Time Steps" at Playwrights Horizons.


Birthplace: Montgomery, AL

CBS Announces Summer 2015 Slate — Scripted dramas "Under the Dome," "Extant" and "Zoo" are all on tap, as is a new season of "Big Brother." Read more...
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