The 2011 Formula One season was the 62nd season of FIA Formula One motor racing. The original calendar for the 2011 Formula One World Championship consisted of twenty rounds, including the inaugural running of the Indian Grand Prix before the cancellation of theBahrain Grand Prix. Pirelli returned to the sport as tyre supplier for all teams, taking over from Bridgestone. Red Bull Racing were the reigning Constructor's Champions. Red Bull Racing's Sebastian Vettel was the defending Drivers' Champion, one of five World Champions appearing on the grid. Vettel won his second World Championship at the 2011 Japanese Grand Prix, becoming the youngest driver, at 24 years and 98 days, to do so. Red Bull Racing won the Constructors' Championship.