Erin Moran, best known for her role as Joanie Cunningham on Happy Days, faced a tragic decline in her later years, battling addiction and homelessness before passing away from cancer at 56.

Says Her Death 'Really Did Hit Hard' Inside Erin Moran's 'Depressed,' Cash-Strapped Final Years: 'Nobody Cares About Me' 'Happy Days' Star Erin Moran Died of Stage 4 Cancer, Authorities Reveal ...