Tom and Nicole's children arrive in Australia for Kidman's wedding

Australian actress Nicole Kidman and fiance, country singer Keith Urban, depart from Kidman's Sydney house in the back of a car June 20, 2006. Kidman and Urban, are back in Australia to be married. REUTERS/Stringer (AUSTRALIA)

Nicole Kidman's son and daughter with ex-husband Tom Cruise became the latest notables Thursday to arrive in Australia for the Oscar-winning actress's star-studded marriage.

Isabella, 13, and Connor, 11, were driven into the luxurious mansion on Sydney Harbor that Kidman and Cruise once shared.

Local media reported they arrived a short time earlier in a private jet from Tokyo, where they were accompanying Cruise on a publicity trip. Kidman is set to marry country music star Keith Urban in a lavish wedding this weekend. Details have been carefully guarded, but local media have widely tipped Sunday night for the event.

"King Kong" star Naomi Watts, a longtime friend of Kidman's, arrived Wednesday and was among those at a women-only party to celebrate the coming nuptials. Urban was expected to have his bachelor party Thursday night.

The guest list reportedly also includes Oscar winner Russell Crowe, "X-Men" star Hugh Jackman, media mogul Rupert Murdoch and his wife Wendi Deng, and Murdoch's Sydney-based son Lachlan and his wife, model Sarah O'Hare.

It is the first marriage for Urban, 38, and the second for Kidman, 39. Cruise ended their 10-year union in 2001, but they share custody of their adopted children.

Kidman - who was born in Hawaii but raised in Australia - won an Oscar for her role in the 2002 film "The Hours." Urban, who was born in New Zealand but also grew up in Australia, won a Grammy in 2005 for best male country vocal performance.

Work was continuing Thursday on erecting a marquee at a gothic-style sandstone Catholic church in the beachside suburb of Manly - the presumed location of the wedding.