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Do you know these surprising facts about hit sitcom Happy Days?

Classic sitcom 'Happy Days' was a huge hit and helped launched the careers of several major Hollywood actors and a very special director.
Garry Marshall's series starred Ron Howard as Richie Cunningham, Henry Winkler as his friend Fonzie, and Tom Bosley and Marion Ross as Richie's parents, Howard and Marion Cunningham.
Across 11 seasons, fans followed their day-to-day lives through '50s and early '60s Midwestern America.
Like all shows, there are many lesser-known facts, check them out...