On the Line - The Race of Champions documentary celebrates the 30th birthday of the Race Of Champions, from its off-road beginnings on Gran Canaria to its popular stadium events in some of the most iconic venues around the world. For over 30 years the Race Of Champions has brought together the world's greatest drivers from Formula 1, Rally, NASCAR, IndyCar, Le Mans, and more to answer one simple question: If you let them loose in equal cars, who's actually the fastest of them all?
| Actor | Role |
|---|---|
 David CoulthardSelf | Self |
 Michael SchumacherSelf (archive footage) | Self (archive footage) |
 Sebastian VettelSelf | Self |
| MMattias EkströmSelf | Self |
| AAndy PriaulxSelf | Self |
| SStig BlomqvistSelf | Self |
 Michèle MoutonSelf | Self |
| MMassimo BiasionSelf | Self |
 Colin McRaeSelf | Self |
 Allan McNishSelf | Self |
 Jimmie JohnsonSelf | Self |
| MMarcus GrönholmSelf | Self |
 Jeff GordonSelf | Self |
 Travis PastranaSelf | Self |
 Tom KristensenSelf | Self |
 Valentino RossiSelf | Self |
 Sébastien LoebSelf | Self |
 Damon HillSelf | Self |
| RRyan ArcieroSelf | Self |
| BBrendon LeighSelf | Self |
| EEnzo BonitoSelf | Self |
 Mick SchumacherSelf | Self |
| HHenri ToivonenSelf | Self |