Erin was best known for playing Joanie Cunningham on 'Happy Days'.

According to CNN.com

Authorities in Indiana found her body Saturday afternoon after getting a 911 call at 4:07 p.m. for "an unresponsive female," the Harrison County Sheriff's Department said.

"Upon the arrival, it was determined that the female was Erin Marie Moran-Fleischmann. First responders determined that she was deceased and an autopsy is pending," the department said.

Many of my friends at the time had a bit of a crush on young Joanie Cunningham.

RIP Joanie .