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Actors Henry Winkler, Anson Williams and Donny Most participated in a panel at FanX in Salt Lake City on Thursday.

The trio recounted some of their best behind-the-scenes memories and their enduring friendships.

Williams, who turned 76 on Thursday, also received a special surprise: a cake and a rendition of "Happy Birthday."

SALT LAKE CITY — "Happy Days" stars Henry Winkler, Anson Williams and Donny Most reunited in Salt Lake City on Thursday afternoon during a FanX convention panel.

The group started their appearance with a special celebration.

It was Williams' 76th birthday, and Winkler came prepared with a chocolate cake to share with a select few and led the crowd through a squeaky rendition of "Happy Birthday."

The singing didn't

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