[1] He started his career as a musician, accompanying his father in Franco-Arabic songs.
He began his acting career in the troupe of the Centre régional d'art dramatique in Algiers.
He began his film career at the age of 24 with Les Amants de demain, directed by Marcel Blistène and Un témoin dans la ville, directed by Édouard Molinaro.
[2][3][4][5] Castel was the widower of Pied-Noir actress Lucette Sahuquet, who died in 1987.
Robert Castel died in the Hôpital de la Pitié-Salpêtrière in Paris on 5 December 2020 following a long illness.