<P> Alex O'Loughlin / oʊ ˈlɒklɪn / ( born 24 August 1976 ) is an Australian actor 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 ) . </P>
<P> Alex O'Loughlin / oʊ ˈlɒklɪn / ( born 24 August 1976 ) is an Australian actor 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 ) . </P>
who plays mcgarrett on the new hawaii five-o
who plays mcgarrett on the new hawaii five-o
Alex O'Loughlin
Alex O'Loughlin