Article continues below advertisementPrince William and Kate Middleton may appear to lead a picture-perfect royal life, but OK! can reveal their home is said to be haunted.And it seems to have piqued their interest in the supernatural when it comes to the way they are raising their kids, Prince George, 12, Princess Charlotte, 10, and Prince Louis, 7.While trick-or-treating is less popular in the U.K. than in the U.S., the family has maintained the tradition, with Kate spotted shopping for costumes and taking the children door-to-door.