<Tr> <Th> Partner (s) </Th> <Td> Mary - Louise Parker (2006--08) Hilarie Burton (2009--present) </Td> </Tr> <Tr> <Th> Children </Th> <Td> </Td> </Tr> <P> Jeffrey Dean Morgan (born April 22, 1966) is an American actor . He is known for playing John Winchester on Supernatural, Denny Duquette on the medical drama Grey's Anatomy, The Comedian in the 2009 superhero film Watchmen, Jason Crouse on The Good Wife, and Negan on The Walking Dead . </P> <P> Morgan portrays Thomas Wayne in the DC Extended Universe beginning with Batman v Superman: Dawn of Justice (2016). </P>

Who plays denny duquette on grey's anatomy