1997: Prince William attends Princess Diana's funeral
22 March 2011 Last updated at 13:25 GMT
Prince William walked behind the coffin of his mother as the Princess of Wales was carried to her funeral service at Westminster Abbey.
He was accompanied by his brother, Prince Harry, father, Prince Charles, and by the Duke of Edinburgh and the Princess's brother, Earl Spencer, in the funeral procession.
Gavin Hewitt reported on the events on 6 September 1997.