Alex Karev.

About Alex Karev

Alexander Michael "Alex" Karev, M.D., F.A.C.S. is a fictional character on the ABC television series Grey's Anatomy, portrayed by actor Justin Chambers. Introduced as a surgical intern at the fictional Seattle Grace Hospital, Karev evolves throughout the series, obtaining the position of resident and eventually specializing as a pediatric surgeon. At one point, he also becomes the Interim Chief of Surgery for six months while Miranda Bailey is on a stress sabbatical. His relationships with colleagues Meredith Grey, Cristina Yang, Izzie Stevens and George O'Malley form a central part of the show's early dynamics.