Dennison Duquette, Jr., more commonly known as Denny Duquette, is a fictional character on the ABC television series Grey's Anatomy. The character is portrayed by actor Jeffrey Dean Morgan, and was created by Shonda Rhimes. He first appeared in the second season episode "Begin the Begin" as a patient of Seattle Grace, and returned later in "What Have I Done to Deserve This?," when he started a relationship with the intern Izzie Stevens; the two became engaged in second-season finale, "Losing My Religion," but Denny died later in the episode.