Billionaire and TV star Donald Trump has been preparing for his third wedding in Palm Beach, Fla., the New York Post reported Monday.

Trump and his bride-to-be, Slovenian model Melania Knauss, have 500 celebrities, including Britain's Prince Charles, Oprah Winfrey, David Letterman, Elton John, New York Gov. George Pataki and California Gov. Arnold Schwarzenegger to their impending nuptials, scheduled for Jan. 22.

Both of Trump's ex-wives, Czech-born Ivana Zelnicek and Marla Maples, are expected to attend, alongside his children Donald Jr., Ivanka, and Eric and Tiffany.

Cameras, recording devices and cellphones have been banned from the event to preserve Trump's exclusive contract with the Getty Images picture agency to sell photos of the ceremony and the party afterwards.

The New York Post quoted sources as saying Trump has an "ironclad" prenuptial contract in place with Knauss, just in case things don't work out.