Ian Macpherson McCallum Stewart (15 July 1929 – 19 March 2017)[1] was a British racing driver from Scotland.

Stewart was regarded by Jim Clark as a highly-strung individual who "at the wheel was as relaxed as anyone".

His only appearance in a World Championship Grand Prix came at the 1953 RAC British Grand Prix, in which – due to ignition failure – he failed to finish in his Ecurie Ecosse-entered Connaught-Lea Francis A. Stewart's main competition was as part of the Jaguar racing Ecurie Ecosse team.

[4] During this period, he was one of three Ecurie Ecosse drivers for the team's debut race at Charterhall, which resulted in a second place for Stewart.

[5][6] It is often said that during the 1954 Les 24 Heures du Mans he rolled an Aston Martin DB3S on the fast stretch between Arnage and White House corners; that however was Jimmy Stewart,[7] Jackie's older brother.