Fashion and political royalty, along with an eclectic mix of celebrity friends of Lauren Bush and David Lauren, have gathered in Colorado for the couple's wedding this weekend. Among the activities in Telluride: A softball game today, rehearsal dinner tonight, the wedding at Ralph Lauren's Double L ranch on Sunday and a rodeo on Monday.

Ivanka Trump, with new baby in tow, is part of the festivities. On Friday she tweeted: ‘Just boarded a plane headed to @LaurenBushTweet's wedding in Colorado. Whoo hoo!’

She added that it was her infant daughter's first plane ride — but surely not her last. "Baby's first flight! So far so good. She's fed and sleeping but... apologies in advance to all other passengers!" she wrote.

Berkley is married to Greg Lauren, the groom's cousin.

A spokesperson for George W. Bush declined to confirm whether the former president, who is Lauren Bush's uncle, would attend the wedding. But the Daily Mail reported that Bush and former first lady Laura Bush will be in Colorado for the festitivites.

"George and Laura are definitely going and they’re looking forward to it," a source close to the couple told the British newspaper. "The idea that bad blood in the past would keep them away is just wrong. It is going to be a happy day and they want to be there to see it.’

The source was referring to reports that the acrimonious divorce of Lauren Bush's parents, Neil and Sharon Bush, in 2003 had caused a rift in the family. However, Neil will attend with wife Maria and Sharon will attend with her Prince Dimitri of Yugoslavia. (Sounds a bit like Dynasty, doesn't it?)

Neil, who is doing business in China and has an account on Weibo with 45,000 followers, wrote on the Chinese microblogging service Friday:

‘My daughter Lauren will be married this Sunday. She is 27 years old, a former model, now is a very successful entrepreneur.
‘She will marry married David Lauren, a very good man, he has loved and supported my daughter.
‘After the wedding, Lauren will become Lauren Bush-Lauren.’

Making matters more intriguing, the wedding is taking place the same weekend as the Telluride Film Festival, where such celebrities as George Clooney and Johnny Depp are rumored to be in town, according to the Telluride Daily Planet.

The newspaper cited Facebook sitings of Oprah Winfrey, although rumors that the former talk show queen was in Telluride could not be confirmed. Winfrey scored a rare interview with Ralph Lauren (David's father) at his Telluride ranch, where the wedding will take place, during her final season. It was his first televised interview in 20 years. And Winfrey was unusually chummy with George W. Bush, when he appeared on her show earlier this year to tout his new book, Decision Points.

About the only notables from the Bush clan who won't be in attendance are Lauren Bush's grandparents, former president George H.W. Bush and former first lady Barbara Bush. A Bush spokesman told ABCNews.com the couple will be unable to go because the ranch's high altitude could pose a threat to their health.