Updated at 11:45 a.m. ET Monday
Erin Moran, best known for playing Joanie Cunningham on the 1970s sitcom, Happy Days, is dead at age 56.
The Harrison County Sheriff's Department says Moran was found unresponsive after Indiana authorities received a 911 call Saturday afternoon. In a short press release on Monday, the department said an autopsy revealed that Moran "likely succumbed to complications of stage 4 cancer." Toxicology test results were still pending.