Justin Chambers is an American actor and former model, best known for his role as Dr. Alex Karev on the popular television series Grey's Anatomy. He was born on July 11, 1970, in Springfield, Ohio, and began his career in modeling before transitioning to acting. Chambers joined the cast of Grey's Anatomy in 2005 and became a fan favorite for his portrayal of the charming and complex character. He left the show in 2020 after 16 seasons, marking a significant chapter in his career. In addition to his work on television, he has appeared in films such as The Wedding Planner and The Musketeer.