Also known as Hag and the Mad Monk of Malibu this son o the legendary actress Mary Martin suffered from advanced Cirrhosis due to years of heavy drinking that required a liver transplant. The transplant saved his life, but gave him Hepatitis C.
Best known for his role as J.R. Ewing on Dallas. He also appeared in several Nip/Tuck episodes as Burt Landau.
Hagman discusses his alcoholism and liver transplant in his book "Hello Darlin': Tall (and Absolutely True) Tales About My Life"