Erin Moran, Who Was Joanie On ‘Happy Days’ And Her Own Spin-Off, Has Died At 56

She started playing Joanie when she was 12. “Over the 10-year run of ‘Happy Days,’ Joanie transformed from the young teenager who complained about being sent to her room to a major character on the show. In later seasons, Joanie’s love interest with the aspiring musician Chachi Arcola became a major story line.”