V8 Supercars driver Jamie Whincup has reportedly called off his wedding the day after his bachelor party.

The 34-year-old was set to wed long-time partner Courtney Nicholson this summer but according to Australia's The Sunday Telegraph, the six-time Supercars champion ended the relationship on the eve of the big day.

Jamie Whincup. Photo / Getty
Jamie Whincup. Photo / Getty

The Sunday Telegraph

reports that the wedding was all paid for and Nicholson, a dancer and model, had bought a dream wedding dress.

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Jamie Whincup and Courtney Nicholson at the 2014 V8 Supercars Gala Awards. Picture / News Corp
Jamie Whincup and Courtney Nicholson at the 2014 V8 Supercars Gala Awards. Picture / News Corp

"It was a huge shock to everyone. Particularly given they were days away from getting married," a source told the newspaper.

Whincup confirmed the split to the The Sunday Telegraph.

"We are just two people who have decided not to be together any more and that's all I can say about it really," Whincup said. "In terms of my personal life I prefer to keep that private."