Justin W. Chambers (born July 11, 1970) is an American actor and former Calvin Klein male fashion model. Since 2005, he has starred in the American Broadcasting Company medical drama series Grey's Anatomy as Dr. Alex Karev. He is also known for his role in the first season of the CBS crime drama series Cold Case. Chambers was born in Springfield, Ohio, the son of Pam and John Chambers. He has a fraternal twin brother named Jason, one older brother John Jr. (Chip), and two older sisters, Mia and Susan. He and his twin brother visited hospitals often as children due to frequent bouts with pneumonia. He attended Southeastern High School in South Charleston, Ohio, and later Springfield Clark JVS. In 1993, he married Keisha, a former model agency booker.
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