The Queen's official 2012 Diamond Jubilee emblem will be chosen by a nationwide children's competition, Buckingham Palace has announced.
The search to find the design will be launched on Blue Peter and thousands of drawings are expected to flood into the BBC programme which is running the event.
The winning logo will be used on a range of items from London buses to crockery in the run up to the milestone and during the year.
The competition is the first announcement by Buckingham Palace of a project to mark the Queen's 60 years on the throne.
The Government has already said there will be an extra bank holiday to help create an extended weekend in June 2012, which will provide a focal point for celebrations, while Greenwich will become a royal borough to mark its association with the monarchy.
The Diamond Jubilee weekend will take place just weeks before the start of the London Olympics and a host of other events are expected to take place in the monarch's honour that year.
In June it was announced Prince William will become patron of the Queen Elizabeth II Fields challenge - an initiative to create and protect hundreds of playing fields - in tribute to his grandmother.
The Queen began her reign on February 6, 1952, after the death of her father George VI.
The emblem design will be chosen from the winners of three age categories six to eight-year-olds, nine to 11-year-olds and 12 to 14-year-olds.
Entries cannot feature an image of the Queen but must include a crown and have to be submitted on an A4 sheet of paper by December 8.