RIP Joanie: ‘Happy Days’ actress Erin Moran found dead

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CORYDON, IN -- Erin Moran who famously played Joanie Cunningham on "Happy Days" has died. Officials in Indiana found her body after getting a 911 call for an "unresponsive female." She was 56 years old.

There's no word on an exact cause of death, but the Harrison County Sheriff's Office announced Monday, "a subsequent autopsy revealed that Mrs. Moran likely succumbed to complications of stage 4 cancer."

Moran shot to stardom in the 70's as Richie's kid sister. Then she got her own show in the short lived spin off "Joanie Loves Chachi."

Several of Moran's co-stars, including Ron Howard and the Fonz, reacted to her death on Twitter.

Rest in Peace Erin. You will be missed.