The 15th BRDC International Trophy was a motor race, run to Formula One rules, held on 11 May 1963 at the Silverstone Circuit, England. The race was run over 52 laps of the Silverstone Grand Prix circuit, and was won by British driver Jim Clark in a Lotus 25.

Results Pos Driver Entrant Constructor Time/Retired Grid 1 Jim Clark Team Lotus Lotus-Climax 1.24:27.6 6 2 Bruce McLaren Cooper Car Company Cooper-Climax + 24.6 s 3 3 Trevor Taylor Team Lotus Lotus-Climax + 34.0 s 5 4 Innes Ireland British Racing Partnership Lotus-BRM + 40.0 s 1 5 Jo Bonnier Rob Walker Racing Team Cooper-Climax 51 laps 14 6 Tony Maggs Cooper Car Company Cooper-Climax 51 laps 11 7 Jack Brabham Brabham Racing Organisation Brabham-Climax 51 laps 4 8 Ian Raby Ian Raby (Racing) Gilby-BRM 48 laps 21 9 Carel Godin de Beaufort Ecurie Maarsbergen Porsche 46 laps 17 DSQ Lorenzo Bandini Scuderia Centro Sud BRM Push-start 10 Ret Jim Hall British Racing Partnership Lotus-BRM Ignition 12 Ret Tim Parnell Tim Parnell Lotus-Climax Piston 16 Ret Philip Robinson A. Robinson & Sons Lotus-Climax Crownwheel & pinion 19 Ret John Surtees SEFAC Ferrari Ferrari Oil leak 7 Ret Graham Hill Owen Racing Organisation BRM Battery 2 Ret John Taylor Anglo-Scottish Racing Team Cooper-Ford Oil leak 18 Ret John Campbell-Jones Tim Parnell Lotus-BRM Ignition 15 Ret Willy Mairesse SEFAC Ferrari Ferrari Accident 9 Ret Chris Amon Reg Parnell (Racing) Lola-Climax Oil seal 13 Ret Richie Ginther Owen Racing Organisation BRM Gearbox 8 DNS André Pilette André Pilette Lotus-Climax Withdrawn (20) WD Peter Arundell Team Lotus Lotus-Climax No car - WD Dan Gurney Brabham Racing Organisation Brabham-Climax Car not ready - WD Tony Settember Scirocco-Powell (Racing Cars) Scirocco-BRM Car not ready - WD Pedro Rodríguez Scirocco-Powell (Racing Cars) Scirocco-BRM Car not ready - WD Phil Hill Automobili Turismo e Sport ATS Car not ready -

References "The Grand Prix Who's Who", Steve Small, 1995. "The Formula One Record Book", John Thompson, 1974.