This file photo shows Britain's Queen Elizabeth II receiving flowers from waiting schoolchildren waiving national flags after Commonwealth Day services during a visit to Sydney in March 2006. (ROB GRIFFITH/AFP/GETTY IMAGES)

The interview is part of a forth-coming book, “Our Queen,” which the Daily Mail says will be a detailed portrait of the woman who is approaching her Diamond Jubilee, a celebration of 60 years on the throne. In an excerpt published by the British paper over the weekend, Prince William tells the tale of his grandmother’s advice to scrap the official list of 777 names to be invited to his wedding, and start from the beginning with his friends. And her subsequent rule that he must wear his Irish Guards uniform, no questions.

“I say to people: ‘She’s my grandmother to me first and then she’s the Queen.” Words that come from her, I take very personally and I really appreciate,’ he told Hardman.

The Daily Mail will be rolling out more excerpts by the veteran royal reporter over the next week.

In other royal news, the Middleton sisters attended yet another wedding over the weekend (the sixth this year for Pippa, the Daily Mail says) providing ample hat photographing opportunities.

Pippa looked radiant in a black pillbox hat and floral print. Catherine, Duchess of Cambridge, was also gorgeous in a red laced dress by Collette Dinningan, and of course, matching hat.