The party is a whole year away - but plans have been unveiled for a major celebration to mark the Queen's 90th birthday.
Singer Katherine Jenkins will be among those performing at the event which will take place over four nights next May.
The pregnant star, dressed in a royal blue dress, posed in front of the regal backdrop of Windsor Castle after the Queen's birthday party plans were announced.
The theatrical spectacular will feature 550 horses and 1,200 participants including musicians, dancers, choirs, and famous actors, actresses and artists from May 12-15.
Members of the royal family will attend the show each night and the Queen will go to the last performance which will be broadcast live on television.
Simon Brooks-Ward, the events producer and director, said: "There will be a very happy and celebratory feel to the whole event. We have been delighted with the level of response from funders and participants. It should be a very special and memorable occasion."
The participants will reflect The Queen's private and public interests. Performers will come from a number of countries including Oman, Chile, New Zealand, Canada, Fiji and South Africa. The military will be well represented and will include The Queen's Mounted Troops and over 100 pipers.
The Prince of Wales is patron of the celebrations and Sir Mike Rake, BT chairman and president of the CBI, is its chairman. Any proceeds from the event will be donated to a number of the Queen's Charities which will be selected by an advisory committee.
The team behind the event said it was already well funded with private donations, and organisations and British business backing the event.