During the pre-production of Dialing The Devil, while standing in line at the cashier of a supermarket, Toon noticed Marceau Bellens and his fiancee standing behind him. When Toon asked Marceau if he would consider playing the role of the Devil, Marceau immediately loved the idea.
On the day of shooting the scene with the school bus, they still hadn't found the proper person to play the role of the bus driver. When the vintage American school bus arrived on set, Toon couldn't have been more lucky with Bert Winkel, the driver from the rental company. When asked if he would mind acting in the film, Bert fortunately said yes.
Toon wanted a very dirty & gritty look for this seventies inspired roadmovie, so Frank van den Eeden and Toon tried out several old 16mm filmstocks. After several tests, they decided to shoot on a double perforated Ektachrome film that was developed as a negative film, giving Dialing The Devil it's distinctive gritty look.
Dialing The Devil was entirely shot in Limburg. The laundromat where Zeffrey makes his phone call to the devil, was actually situated in the center of Zonhoven, the director's hometown. Unfortunately, the old laundromat has since been teared down.
The term "Dialing The Devil" is actually slang for masturbating.