The former Big Brother star will hold the ceremony at Down Hall country house in Hertfordshire, despite originally planning to have it at the Victorian Chapel in the Royal Marsden Hospital.
"I am going to die in this hospital, so I don't want to get married here," she recently told The Sun. "But wherever we tie the knot, I'm determined to walk down that aisle."
Goody was proposed to on Valentine's Day after being told that her cancer is terminal and that she has just months to live.
Harrods owner Mohammed Al Fayed has gifted her a designer wedding dress while Sir Elton John offered her the use of one of his homes for the wedding. Jonathan Ross, Simon Cowell and Dale Winton have all sent messages of support.
It is understood that the star is seeking a £3 million magazine deal for the event, which will go towards the trust fund that has been set up for her two young sons.