Justin Chambers is an American actor. His acting career started in the mid ’90s. His debut was on the soap opera Another World. He next starred on the made-for-television films Harvest of Fire and Rose Hill. In 1999, he made his cinematic debut in Liberty Heights. He later had roles in the films The Wedding Planner, The Musketeer, and Leo, among others. He also starred on the TV movie Hysterical Blindness. His major breakthrough came as Dr. Alex Karev on the medical drama series Grey’s Anatomy. He’s been playing said role since 2005. He’s also played Barry Allen / The Flash on the direct-to-video movie Justice League: The Flashpoint Paradox.