Prince William is reportedly set to marry his longtime love Kate Middleton next year. Sources claim the prince will proposed to Middleton this Christmas and a formal announcement will be made. The wedding ceremony is planned for next summer. “A number of bridges have to be crossed before any announcement,” says a royal source. “A Christmas engagement will allow William time to complete stints in all the armed services. It will also allow Kate time to be gradually introduced to the Royal court and be groomed in such matters as protocol and service.”