George O'Malley is a fictional character from the medical drama television series "Grey's Anatomy", O'Malley married Callie Torres, played by which Mexican American actress, singer and songwriter?
George O'Malley:  O'Malley married Callie Torres (Sara Ramirez) whom he later separated with to pursue a relationship with Izzie Stevens. Sara Ramirez: Sara Elena Ramírez (] ; born August 31, 1975) is a Mexican American actress, singer and songwriter.
Sara Ramirez