Getty Images/Chris Jackson
The monarch and the Duke of Edinburgh are being joined by Britain's current political leaders including Prime Minister David Cameron and leader of the opposition Jeremy Corbyn, military leaders, and religious leaders at the Centopath war memorial, where wreaths will be laid.
A two-minute silence will be held at 11am GMT, followed by a war veteran's march and parade through London.
On Saturday, the Queen and the Duke of Edinburgh attended the Royal Festival of Remembrance at London's Royal Albert Hall.
The Duke and Duchess of Cambridge were also in attendance.