1923: Prince Albert, Duke of York and Lady Elizabeth Bowes-Lyon married in 1923. The tradition of using white flowers was already in place for this ceremony. © PA/PA Archive/Press Association Images

1947: HRH Queen Elizabeth II and her husband Prince Philip, Duke of Edinburgh, leave Westminster Abbey after their wedding ceremony. The bridal bouquet was made up of white orchids and a sprig of myrtle – from the bush grown from the myrtle in Queen Victoria's wedding bouquet. © PA/PA Archive/Press Association Images

1960: Princess Margaret and her bridegroom, Anthony Armstrong-Jones pose with the rest of their wedding party at Buckingham Palace after their marriage ceremony at Westminster Abbey. © PA/PA Archive/Press Association Images

1960: Princess Margaret's wedding bouquet, left behind at Westminster Abbey. As history dictates, the bouquet from this year’s wedding will be left on the tomb of the unknown soldier in the Abbey. © PA/PA Archive/Press Association Images

1973: Prince Philip escorts his daughter, Princess Anne, down the aisle of Westminster Abbey during her wedding to Captain Mark Phillips. The bouquet was very typical of the style in 1973. © PA/PA Archive/Press Association Images

1973: Princess Anne’s bridal bouquet was made up of white roses, lilies of the valley and stephanotis, whilst a sprig of myrtle provided the "something old". © PA/PA Archive/Press Association Images

1981: Lady Diana's wedding bouquet was 42 inches long, 15 inches wide and Edwardian in style, containing yellow 'Mountbatten' roses, named after Prince Charles' late mentor, white orchids and the traditional myrtle.

1981: Lady Diana’s bouquet was beautifully scented, from the profusion of gardenias, freesia and lily of the valley. The arrangement was set off by 200 exquisite stephanotis flowers, each individually wired. © PA/PA Archive/Press Association Images

1981: Doris Wellham, head florist at Longman's in the City of London, who made Lady Diana’s bouquet. © PA/PA Archive/Press Association Images

1986: The Duke and Duchess of York during their wedding ceremony at Westminster Abbey, London. © PA/PA Archive/Press Association Images

1986: Jane Packer became the first non by-appointment florist to make a Royal Bouquet when Sarah Ferguson broke with tradition. © PA/PA Archive/Press Association Images

1986: The bouquet was an 'S'-shaped spray of cream lilies, palest yellow roses, gardenias, lilies-of-the-valley and the traditional sprig of myrtle. © PA/PA Archive/Press Association Images

1999: Prince Edward & Sophie Rhys-Jones Marriage at St George's Chapel, Windsor Castle, took place in 1999. © PA/PA Archive/Press Association Images

1999: The shower bouquet was created around a new variety of tall lily named after Sophie. The rest was comprised of blown ivory garden roses, scented stephanotis, clustered lily of the valley and ivory freesia. © PA/PA Archive/Press Association Images

2005: At her wedding to Prince William’s father, Prince Charles, Camilla Parker Bowles carried a bouquet of lily-of-the-valley and yellow, purple and white primroses with a sprig of myrtle, sent by a well-wisher from Cornwall. © PA/PA Archive/Press Association Images

2005: Made by Shane Connolly, who is of course the florist making the bouquet for this year’s big wedding, constructed Camilla’s, which is exquisitely wired. © PA/PA Archive/Press Association Images

2011: What will be in this year’s Royal wedding Bouquet?