The 2009 Brazilian Grand Prix (formally the XXXVIII Grande Prêmio Petrobras do Brasil) was a Formula One motor race which was held on October 18, 2009 at the Autódromo José Carlos Pace, São Paulo, Brazil. It was the sixteenth race of the 2009 Formula One season. The drivers' title and the constructors' title were both decided by the result of the race in favour of Jenson Button and Brawn GP.This race was won by Mark Webber, who earned his second victory of the season and his career.