On 20 Jun 1837 King William IV of the United Kingdom (age 71) died at Windsor Castle [Map]. His niece Queen Victoria of the United Kingdom (age 18) succeeded I Queen Great Britain and Ireland. His brother Ernest Augustus King Hanover (age 66) succeeded King Hanover. Frederica Mecklenburg Strelitz Queen Consort Hanover (age 59) by marriage Queen Consort Hanover.

At 5am Francis Nathaniel Conyngham 2nd Marquess Conyngham (age 40) and Archbishop William Howley (age 71) went to Kensington Palace to inform the Princess she was now Queen. Francis Nathaniel Conyngham 2nd Marquess Conyngham (age 40) was the first to address her as 'Your Majesty'.