What exciting news yesterday — Prince William is engaged! The lucky bride? Ms. Kate Middleton of course, his stunning on and off-again girlfriend of the past eight years. Now, the fun begins! What dress will she wear? When will we get our first glimpse of the ring? Who will attend the biggest celebration of Spring or Summer 2011? One thing is certain — Kate should take her style cue from Princess Diana, whose wedding-day grace, elegance and beauty still radiates today. Here, a photo of the happy couple, and a few shots of Princess Di and Prince Charles taken almost 30 years ago on their own big day!