Ivana Trump ITRUMP020608_06.jpg

Ivana Trump, 59, and her much younger Italian actor boyfriend, Rossano Rubicondi, 35, are set to tie the knot tomorrow in Palm Beach at Mar-a-Lago.

According to the PalmBeachPost.com, a nine foot tall wedding cake was ordered and will be shipped from Germany, and there will be 25 bridesmaids and groomsmen. Ivana's daughter Ivanka will be the maid of honor, and sons Donald Jr. and Eric, will give her away. Celebrities rumored to attend Saturday's festivities include Liza Minnelli, Diana Ross and Natalie Cole. "It's going to be extraordinary," said Ivana's publicist, Catherine Saxton.