The wedding is expected to take place Sunday at the Mary MacKillop chapel in North Sydney and the honeymoon in Fiji, Undercover Music News reported Tuesday.
Kidman, who ended her 10-year marriage to Tom Cruise in 2001, met Urban in January 2005 at an awards banquet in which the Australian government honored the two Australians.
They were both born in other countries. Kidman was born in Hawaii and raised in Australia, while Urban was born in New Zealand and also raised in Australia.
2014: The Year in Music [PHOTOS]