A radiant Diana, just 22 and pregnant with Prince Harry, takes a break as she watches Charles play polo at Smith’s Lawn, Windsor, in June 1984. She later described the weeks before Harry’s birth as the happiest of the marriageDiana was a devoted ballet fan and regularly went to see the company of the Royal Ballet School at rehearsal. Here she is in 1987. She gave up her own hopes of ballet dancing when she grew too tallJust two weeks before the birth of Prince William, Diana jokes with Sarah Ferguson at a polo matchGetty Images Prince Charles and Princess Diana on their last official trip together, 1992 Photo (C) GETTYCharles and Diana announce their engagement in 1981 Photo (C) GETTYGetty Images Diana, Princess of Wales and Prince Charles, Prince of Wales kiss during a prize giving ceremony at a polo match, 1992 Photo (C) GETTYPrince Charles, Prince of Wales and Diana, Princess of Wales look sad as they arrive in Seoul for the start of their visit to South Korea, 1992. Photo (C) GETTY IMAGESPrince Charles and Diana in Vancouver, Canada, 1986 Photo (C) GETTY IMAGESQueen Mother with Prince Charles and Princess Diana, 1986 Photo (C) GETTY IMAGESPrince Charles and Princess Diana with Prince William and Prince Harry at home Photo (C) GETTY IMAGES