We're inching closer to another royal wedding -- fashion (and American) royalty, that is!

Page Six reports that FEED designer and former president George H.'s granddaughter Lauren Bush and David Lauren, son of Ralph, recently feted their engagement with an all-white party in Water Mill, New York.

The gossip column adds that the nuptials will be held in September at the Lauren family ranch in Telluride, and, most importantly: "the bride will take the name 'Lauren Bush Lauren.'" Period. No hyphen.

Well, that sounds pretty definitive to us -- back in April, Lauren Bush joked about her what-to-call-myself conundrum with Harper's Bazaar :

"Out of all the people I could've met and fallen in love with," says a laughing Bush, now 26, of her husband-to-be, "it's just ironic that David would end up with someone named Lauren." [....] "I think it will be Lauren Bush-Lauren. That's not final, but I think it's nice to have the same name as your husband. I am sort of old-fashioned in that way."

And it can't hurt when your husband's dad is responsible for creating your dress. Lauren also told the glossy that future father-in-law Ralph would be putting together her gown, the second bride he'll clothe this year.

He -- along with some help from Vera Wang -- also created a silk tulle and duchess satin dress, with a nine-foot, tiered train for his daughter Dylan's nuptials. She posed in the gown for the August issue of Vogue , telling the glossy, "It's really beautiful. I know that every bit of his energy and heart went into making sure that I liked it."

Read more about the Bush-Lauren engagement party at NYPost.com .