Erin Moran of 'Happy Days' dead at 56

Actress Erin Moran, who played Joanie Cunningham on "Happy Days," has died at age 56.

TMZ reported the death on Saturday.

Moran also appeared on the short-lived show "Joanie Loves Chachi." 

Moran also acted on "Murder, She Wrote," and "Desperation Boulevard."