The Mail on Sunday reported the two princes have invited the richest people in Britain to the May 7 Help for Heroes fundraising campaign.

The charity is raising nearly $14 million to renovate the Military Rehabilitation Center in the county of Surrey. British soldiers injured in Iraq and Afghanistan are among the troops who use the facility.

A source close to the royal pair told the Mail that helping injured soldiers has become a personal goal for both men, particularly since Harry returned from Afghanistan this year.

"The cause -- helping injured soldiers -- is of huge importance to both of them, in particular Harry who has now seen first-hand what goes on in Afghanistan," the unidentified source said.

The event reportedly will take place in London but its exact location has yet to be revealed to the public.