United Kingdom, Aug. 15 -- Ron Howard threatened to quit his hit Happy Days over plans to change the title.

The actor-turned-moviemaker played Richie Cunningham in the hit TV show with Henry Winkler as best friend Arthur 'Fonzie Fonzarelli and he's revealed he almost walked away from the popular series when his bosses floated the idea of changing the name to Fonzie's Happy Days because of the popularity of Winkler's character.

He told Vulture: "I never, ever challenged what they were doing creatively. It made perfect sense that you'd build this Fonzie character and maximize that.

"But the optics of now being in a show called Fonzie's Happy Days, my ego wouldn't allow for that. I wasn't bluffing. I would've left.

"And my contract, I'm ...