(RNN) - Happy Days actress Erin Moran died Saturday at age 56.
She was found unresponsive at her Indiana home by Harrison County Sheriff dispatch officers, according to The Hollywood Reporter.
She played Joanie Cunningham, the little sister of Ron Howard's Richie Cunningham, on the television situation comedy. The show ran from 1974 - 1984.
Actor Henry Winkler, best known for playing Arthur Fonzarelli on Happy Days, tweeted in part that "now you will finally have the peace you wanted so badly here on earth."
After Happy Days, Moran starred in the spinoff sitcom Joanie Loves Chachi (1982 - 1983).
She made guest appearances on other television shows, including Diagnosis Murder, The Love Boat, The Bold and the Beautiful and Murder, She Wrote.
An autopsy is pending.