(CBS) Prince William and Kate Middleton had a lot of help planning their lavish April 29, 2011, wedding – but the prince said some of the most valuable advice came from his grandmother.

In an interview with British journalist Robert Hardmann for his book “Our Queen,” excerpted in the Daily Mail, William revealed the advice Queen Elizabeth II gave him about the wedding guest list.

Pictures: 장흥콜걸 Prince William and KatePictures: Royal wedding processionPictures: Royal wedding ceremonySpecial section: The royal wedding