The queen has lobbied world leaders on behalf of the prince of Wales and suggests that they one day choose Charles to succeed her as the Commonwealth's head.
The Queen's public endorsement of her son is an unprecedented move and came as she officially opened a major Commonwealth Summit attended by Presidents and Prime Ministers from around the world.
Talking about her wishes will probably end many years of speculation about who will take over as head of the institution, as her father King George VI first led in the aftermath of World War II.
The leaders are going to discuss the issue of Commonwealth succession during the two-day Commonwealth Heads of Government Meeting, which will also see leaders discuss topics from a blue charter for cyber security and trade marine conservation.
With Charles and other senior royals sitting in front of her in the Buckingham Palace Ballroom, the Queen told delegates: "It is still a great pleasure and honor to serve you as Commonwealth boss and to observe with pride and satisfaction that this is a thriving
"It is my sincere wish that the Commonwealth will continue to offer stability and continuity for future generations and will decide that the Prince of Wales should continue the important work my father started in one day. 1949. "
Malta Prime Minister, Dr. Joseph Muscat, Outgoing Chairman of the Commonwealth, also supported Charles as the head of the Commonwealth, apparently confirming the prince's future role was a security.
The Queen has been the leader of the Commonwealth since he came to the throne in 1952, but the post is not automatically held by the British monarch.
Downing Street said on Monday that a decision as to whether the prince You succeed your mother as the Commonwealth Head, was expected from the presidents and prime ministers on Friday, and the reports have said that the atmosphere is that Charles will get their support.
With the UK leaving the EU, the Commonwealth, a collection of former states, once part of the British empire, is likely to become increasingly important in terms of trade opportunities for Britain.
Charles has highlighted his affinity with the Commonwealth in recent years and in his words of welcome to the leaders said: "For my part, the Commonwealth has been a fundamental feature of my life as long as I remember, beginning with my first visit to malta when he was just five years old. "
He told the Commonwealth giants that he had met and talked about as Kenneth Kaunda, Zambia's first president, and Canada's former Prime Minister Pierre Trudeau whose son Justin Trudeau now has the post and was among the guests.