Actress Erin Moran, best known for portraying Joanie Cunningham on "Happy Days," was found unresponsive in Indiana on Saturday, April 22 before dispatchers declared her dead at 4:07 PM (according to NBC News). She was 56.
Henry Winkler, who played co-starred on the TV sitcom as The Fonz, took to Twitter to share his feelings on Erin's passing.