Marlborough - In one of Marlborough's worst-kept secrets, All Black Dan Carter and former Black Sticks striker Honor Dillon will tie the knot in a private ceremony in the South Island of Blenheim on Friday.

VIDEO: Dan Carter set to tie the knot

According to the Sydney Morning Herald website, rumours about where Dillon - whose family are long-term Marlborough residents - and her boyfriend of nine years will marry have been circulating since they announced their engagement last year.

Working on the six degrees of separation theory - and in Marlborough it's more like two degrees - it took only a few calls to substantiate the rumours.

Several people - who did not want to be named - shared the opinion that the wedding would be at Timara Lodge. However, a lodge employee flatly denied the possibility.

Word is the All Black No 10 and his hockey playing, fellow underwear model fiancee have signed a deal with Australian Women's Weekly for about $50 000 for exclusive coverage of the wedding.

No representative for either Carter or Dillon could be reached for comment.