Ron Howard had to disguise himself in public to avoid being recognised by fans due to the popularity of Happy Days.
The actor played wholesome protagonist Richie Cunningham in the ABC sitcom from 1974 until 1980, but away from filming, the star had to adopt a tougher look that resembled Henry Winkler's rebellious Arthur "The Fonz" Fonzarelli to go about his life without being recognised by viewers.
