Erin Moran dies at 56, played Joanie on "Happy Days" FOX 29 Philadelphia Entertainment Published April 23, 2017 9:39 AM EDT Share Copy Link Email Facebook Twitter LinkedIn Reddit Published April 23, 2017 9:39 AM EDT NEW YORK (AP) - Erin Moran, the former child star who played Joanie Cunningham in the sitcoms "Happy Days" and "Joanie Loves Chachi," died Saturday at age 56.