Winkler reveals which Happy Days guest star let fame go to his head

Henry Winkler revealed at a Tennessee fan expo that one guest star on Happy Days—who played Eugene Belvin and appeared in 10 episodes—let his fame go to his head, calling him an “assback.” Winkler didn’t name the actor directly, but contrasted the set’s ensemble vibe with the ego of this guest star. He also praised Ron Howard’s advice to control temper on set, recalling Howard’s counsel not to punch the script. Mandel’s screen appearances faded after 1982, with his last onscreen role reportedly in 2006.