The Dr Pepper brand had enjoyed success with several advertising campaigns in the decades before David Naughton appeared. This soft drink has been associated with slogans such as “Drink a little to eat at 10-2-4 o’clock” and “America’s most understood beverage”, and in 1977, the “Be A Pepper” has been a huge hit. Naughton’s songs and dances will declare “I am Pepper” and pressure friends like a soda evangelist, staring at the camera with the fervor of a cult devotee and ask if you are So does Pepper.
In all seriousness, the “Be A Pepper” commercial is one of the wackiest to get in the way of the American consumer. Michael Jackson and Jacksons, Tanya Tucker, and Garth Brooks will all be Peppers. The jingle has become famous as “fresh” Mentos ads or ads that showcase how many licks it takes to get to the heart of a Tootsie Pop. There must be something in Naughton’s charming smile, a terrifying innocence, that Landis found necessary for her tragic leader.
As the shaggy David Kessler, Naughton had a pretty big arc to complete, first living out his dream and backpacking through England, then being attacked by a werewolf, 1) killed his lover and 2) subject him to a horror curse, with a terrible curse of increasing pain. Naughton recalls how eerie it felt to go so smoothly:
“It’s a bit unusual, but it’s probably as simple as that because John wrote the screenplay for the film and was also the director and executive producer. He was the man for this project.”
https://www.slashfilm.com/1051427/how-dr-pepper-helped-land-david-naughton-his-role-in-an-american-werewolf-in-london/ How did Dr. Pepper help David land his role in an American werewolf in London