We've been wondering if newlyweds Prince William and Kate Middleton had any pet names for each other and turns out they do! And it's like the sweetest thing ever!At home and away from the private eye they call each other Mr and Mrs Wales! Awwww.A guest at their wedding reception said when William toasted Kate, he said "I'd like to raise a toast to Mrs. Wales." Their recently changed their last names to Cambridge but until the wedding Prince William's last name was Mountbatten-Windsor. We think their nicknames for each other are really sweet. (USWeekly)