The pair starred in 'Moulin Rouge' together and Nicole - who is reportedly marrying country singer Keith Urban on Sunday (25.06.06) - wants to perform 'Come What May' with the Scottish actor at her wedding reception.
The actress is even believed to have asked Ewan to wear a kilt for the performance.
Nicole, 39, had her hen party at her sister's Sydney home last night (21.06.06).
Dressed in black, the flame-haired star looked in a sombre mood, but soon cheered up when her actress friend Naomi Watts made her dance while wearing a cream veil.
Nicole's two adopted children, Isabella, 13, and Connor, 11, have now reportedly flown into Australia for the nuptials.
The 'Cold Mountain' star adopted the children with actor Tom Cruise during their nine year marriage.
Isabella and Connor, who travelled by private jet, were picked up at Sydney Airport by their mother's security staff in a black Mercedes.
Meanwhile, the star-studded wedding guest list has been revealed.
Naomi Watts, Russell Crowe, Hugh Jackman and director Baz Luhrman are all expected to attend.