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Alex O'Loughlin (born Alexander O'Lachlan on 24 August 1976 in Canberra, Australia) is an Australian actor, currently starring in CBS's Hawaii Five-0 as Lieutenant Commander Steve McGarrett.
His best known earlier roles include Kevin Hiatt in The Shield, Mick St. John in Moonlight, Dr. Andy Yablonski in Three Rivers, and the romantic comedy film, The Back-up Plan, where he starred alongside Jennifer Lopez.
He is also the current ambassador for Donate Life America.
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