But what of one of the most important elements of any wedding: The music?
The latest name in the mix is the leading knight of British pop music, Sir Paul McCartney. Britain's Daily Star claimed that McCartney has been approached to sing at the grand reception hosted at Buckingham Palace.
Not so, palace insiders tell PEOPLE. And the chatter has been dismissed as "tabloid speculation" by a rep for the former Beatle.
Perhaps the Grammy-nominated rockers Kings of Leon could fill the spot. The band would "jump at playing the royal wedding if we were asked," drummer Nathan Followill told The Sun. And they have something of a head start as they met William's brother Prince Harry backstage recently and even played ping pong with him.
"Harry is the dude. His is the wedding we would most likely play," Followill told the paper.
Another option? New dad Elton John has already quipped that he may appear in some capacity – joking that he might even take the street performer route and be busking outside of Westminster Abbey.
Still, nothing's been set yet as the couple are still hashing out details with their advisers. "It's too early to know [for sure]," says a palace spokesperson.
And the latest chatter in the Sunday Telegraph says that a 'supergroup' of musicians connected with William's father's Prince's Trust charity (such as Phil Collins, Joss Stone and Bryan Adams) may be asked to perform.
Though it's pretty safe to say it won't be Snoop Dogg.