Among the guests having lunch with the Queen at Westminster Hall is Tanya Whyte from Brixton.
She was invited because of the work she does with Ebony Horse Club, a charity that gives disadvantaged children the opportunity to learn to ride.
Our reporter Ria Chatterjee caught up with her ahead of the big day.
An investigation has been launched into how unpaid workers bussed into London for the Diamond Jubilee celebrations were left stranded.
The Archbishop of Canterbury Rowan Williams spoke of the Queen's lifelong dedication to her people, her country and the commonwealth.
The Queen has a packed schedule on the final - and climactic - day of the Diamond Jubilee weekend.