Formula One star Jenson Button is engaged to his model girlfriend Jessica Michibata.

Japanese beauty Michibata was seen wearing an impressive diamond engagement ring during day three of the sport's One Winter Testing sessions in Bahrain on Friday (21Feb14), and a spokesperson for the couple has now confirmed the engagement, telling Britain's Daily Mail the pair is "delighted".

The British racing driver first met Michibata in 2008 but they did not begin dating for several months.

Button dedicated his 2009 Formula One World Championship win to his girlfriend, but they briefly split in 2011 before reuniting six months later.