The 9th BRDC International Trophy was a motor race, run to Formula One rules, held on 14 September 1957 at Silverstone Circuit, Northamptonshire. The race was run over two 15 lap heats and a 35 lap final, and was won by French driver Jean Behra in a BRM P25. The field also included several Formula Two cars, highest finisher being Roy Salvadori in a Cooper T43, finishing in eighth place overall.