Jeweller spent a year with Pitt to design the wedding ring

Wills and Kate were just the warm up for the true wedding of the century.

After years of cohabitation, six kids and countless tabloid headlines, Brad Pitt and Angelina Jolie made it official - They plan to make it official.

If you thought the media circus involving the world's most glamorous couple was on overdrive before, just wait. Now that Brangelina are officially engaged, expect endless speculation about where and when they'll wed, what they'll wear, what their kids' roles will be, and who might get to attend the celebration.

"This is really a state wedding," said Stephen Galloway, executive editor of features at The Hollywood Reporter. "This is America's equivalent to Prince William and Kate Middleton."

Mr. Pitt's manager confirmed the couple's engagement on Friday after Ms. Jolie was spotted wearing a diamond ring on her wedding finger. Jeweller Robert Procop said he spent a year working with Mr. Pitt to design the ring.

"The prominent engagement ring is giving the world a warning," Mr. Galloway said. "It says 'look out, get ready.'"

Bradley Jacobs, a senior editor at Us Weekly, said we could expect massive media coverage: "We will not rest until we know when and where and how and who's going to be there."

Entire magazine issues could be devoted to each star's wedding — day outfits and hairdos.

"Every single designer on the planet will be pursuing Angelina for the dress," said Mr. Galloway. "It's literally worth millions of dollars in business."

Ms. Jolie's wedding dress is a career-making outfit for the winning designer. Even Mr. Pitt's look leaves room for ample speculation — Long hair or short? Facial scruff or clean shaven? A classic tuxedo? And designed by whom?

Then there's the guest list. Who will be the best man and maid of honour? Will Jolie's father, Jon Voight, attend? Will George Clooney be in the house? Ms. Jolie has said she doesn't have many close friends.

"This is going to be a map of the inner state of their private life," Mr. Galloway said. "This is like Kremlinology. You'll be able to read all sorts of things into this wedding."

Unless, of course, the two elope.

The A-listers have been partners since they began a relationship in 2005 while working on the film "Mr. & Mrs. Smith."

Already megawatt superstars in their own right, the romantic pairing of Mr. Pitt and Ms. Jolie instantly made them Hollywood's most glamorous and photographed couple. The fact that Mr. Pitt was still married to Jennifer Anniston when he met Ms. Jolie only fuelled the tabloid fire; Mr. Pitt and Ms. Aniston divorced in 2005 after five years of marriage.

Ms. Jolie was previously married to Billy Bob Thornton and British actor Jonny Lee Miller.