Biography
Alex O'Loughlin is an Australian actor, writer and director, who plays Lieutenant Commander Steve McGarrett on CBS' remake of the TV series Hawaii Five-0. He had starring roles in the films Oyster Farmer (2004) and The Back-up Plan (2010), as well as on such television series as Moonlight (2008) and Three Rivers (2009).
O'Loughlin was born on 24 August 1976, in Canberra, Australia, of Irish and Scottish descent.His father is a physics and astronomy teacher in Sydney and his mother is a nurse.
O'Loughlin suffered from obsessive-compulsive disorder when he was a child. He enrolled at the National Institute of Dramatic Art (NIDA) in Sydney in 1999 and graduated in June 2002 after completing a three-year, full-time Bachelor of Dramatic Art program.
O'Loughlin began working in short films and fringe theatre as a teenager in Sydney. One of his first acting jobs was an extra in a commercial, playing a Marine. After graduating from NIDA (National Institute of Dramatic Arts), he began his career in Australian television and film productions. Some of his TV credits include roles in BlackJack: Sweet Science, Love Bytes and White Collar Blue.
Filmography
Cast Credits

Hawaii Five-0
Character: Steve McGarrett
TV • 2010

The Back-Up Plan
Character: Stan
MOVIE • 2010

Three Rivers
Character: Dr. Andy Yablonski
TV • 2009

Whiteout
Character: Russell Haden
MOVIE • 2009

August Rush
Character: Marshall
MOVIE • 2007

Moonlight
Character: Mick St. John
TV • 2007

The Invisible
Character: Marcus Bohem
MOVIE • 2007

The Holiday
Character: Kissing Couple
MOVIE • 2006

The Incredible Journey of Mary Bryant
Character: William 'Will' Bryant
TV • 2005

Criminal Minds
Character: Vincent
TV • 2005

Feed
Character: Michael Carter
MOVIE • 2005

Man-Thing
Character: Fraser
MOVIE • 2005

BlackJack: Sweet Science
Character: Luke Anderson
MOVIE • 2004

Oyster Farmer
Character: Jack Flange
MOVIE • 2004

White Collar Blue
Character: Ian Mack
TV • 2002

The Shield
Character: Kevin Hiatt
TV • 2002
Crew