Royal bridal bouquets are always made up of white and ivory flowers, and Lily of the valley is the most popular bloom. It appeared in the bouquets of the Queen, Princess Diana, Sophie Countess of Wessex, Camilla Duchess of Cornwall, the Duchess of Cambridge, and Zara Phillips. Every royal wedding bouquet contains a sprig of myrtle, ever since Queen Victoria started the tradition – the sprig is actually taken from a bush that was grown from Victoria's original cutting. After the ceremony, the bouquet is always laid on the Grave of the Unknown Warrior in Westminster Abbey.