Camilla, the Queen Consort, is accompanying him and PM Liz Truss will join the royal couple at a church service in Belfast city centre.
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Queen Elizabeth II death: 29 pictures show crowds supporting King Charles
By Gemma Murray
Published 13th Sep 2022, 12:32 BST
Updated 13th Sep 2022, 13:07 BST
Crowds have gathered to greet King Charles on his first visit to Northern Ireland as monarch.