Daniel Brühl Who plays Ronal Gumpert in this movie has previously played Niki Lauda in Rush (2013) another Biopic on Racing.
Gianni Agnelli, the head of Fiat at the time of the film's events, is played by his real-life grandson, Lapo Elkann.
At the post Rally Monte Carlo celebrations, the real life Cesare Fiorio can be seen sat at a table where he nods and smiles at the actor portraying him.