Attendees will witness The Queen's seven decade reign, brought to life in a vibrant festival of creativity in central London.
You will enjoy watching artists and performers from across the UK and Commonwealth as they create a once in a lifetime experience.
There are 250 pairs of tickets to be won and all you need to do is pop your details in the form on the Cadbury website we've linked to via the button below.
More Royal merchandise: Free Prince Philip 'Strength & Stay' Coin