Jeffrey Dean Morgan (born April 22, 1966) is an American actor. He is best known for portraying Denny Duquette in the medical drama Grey's Anatomy for parts of three seasons (2006-2009), John Winchester on Supernatural, The Comedian in the 2009 superhero film Watchmen, and Ike Evans in Magic City. He is currently playing the role of Jason Crouse on the TV series The Good Wife. He will portray Negan in AMC's The Walking Dead.