Erin Moran's "Happy Days" co-stars speak out after the news of her death.

We are still shocked about the news that "Happy Days" co-star Erin Moran passed away Saturday at the age of 56. 

An autopsy is pending.

Erin's co-stars, Ron Howard (Richie) and Henry Winkler (Fonz) shared their thoughts on Twitter Sunday morning.

 
 

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