Former Happy Days and Joanie Loves Chachi star Erin Moran likely died from cancer, according to officials.
She was also the star of the spin-off Joanie Loves Chachi with Scott Baio, which ran for two seasons.
She became a star at age 13 for her role as Joanie Cunningham on the sitcom Happy Days, which ran from 1974 to 1984.
The Harrison County, Indiana, Sheriff’s Department released a statement to The Associated Press Monday saying that an autopsy revealed the 56-year-old actress had stage-four cancer.