The UK will fall silent for two minutes at 11:00 BST as the country pays its respects to the war dead.
King Charles will lead a Remembrance Day service for the first time as monarch since the death of his mother, Queen Elizabeth II, in September.
The late Queen considered Remembrance Sunday one of the most important royal engagements in the calendar.
The King, politicians and faith leaders will lay wreaths at the Cenotaph memorial in central London.
King Charles’ ring of poppies will incorporate a ribbon of racing colours in a tribute to the ones used by the late Queen and his grandfather King George VI.