One person who would never have dreamed of missing today's celebrations is Margaret Tyler from Wembley.
She has 10,000 pieces of royal memorabilia and says she will never stop collecting.
Glen Goodman was given the full tour earlier this week.
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Princess Eugenie has become engaged to long-term boyfriend Jack Brooksbank, Buckingham Palace has announced.
Darren Osborne, 48, allegedly mowed down worshippers attending Ramadan night prayers in June last year.
The woman was left with a fractured skull and an arm broken in several places after the attack in Brixton.