Prince William and Kate Middleton are said to be big fans of the married entertainers and the Daily Star Sunday reports that the pair have accepted the offer.
"Both William and Kate are massive fans of Beyoncé and Jay-Z," a source said. "They really wanted to make their big day even more special and what better way than by getting pop royalty to perform at the party?
"Will and Kate will have an official reception for hundreds of dignitaries before throwing a less formal bash for loved-ones. They both wanted to ditch traditions and make it more personal for them.
"Jay-Z and Beyoncé are both in Europe at the moment while she promotes her new single 'Run The World (Girls)'. So it's highly likely they have taken up the Royals' offer. After all, who would turn down a once-in-a-lifetime gig like that?"
It was recently reported that beer had been banned from the big day.