Jo Siffert
The film includes real-life racing footage and cameo appearances by drivers including Formula One World Champions Phil Hill, Graham Hill, Juan Manuel Fangio, Jim Clark, Jochen Rindt and Jack Brabham. Other drivers who appeared in the film include Dan Gurney, Ludovico Scarfiotti, Richie Ginther, Joakim Bonnier, Bruce McLaren and Jo Siffert.