2. PowerPoint Show by Andrew ♫ Turn on Speakers

3. The Queen arrived in a horse-drawn carriage for a 90th birthday extravaganza in the grounds of Windsor Castle. The celebration featured 900 horses, performances from a dazzling line-up of singers and narrations by A-list actors. Also attending were the Duke and Duchess of Cambridge, Prince Harry, Prince Charles and the Duchess of Cornwall.

4. The Queen arrived at the Windsor Castle performance ring in a horse-drawn carriage, accompanied by Prince Philip.

5. As the Queen stepped off the Scottish State Coach, she was met by her son, Prince Charles, who took her hand to kiss.

6. The Queen was greeted with a kiss on the cheek by her son Prince Charles as she arrived at the glittering televised event.

7. Prince Charles wrote a tribute to his mother the Queen in the event's official program. Pictured, greeting the Queen last night.

8. Prince Charles' wife, the Duchess of Cornwall, pictured, was also on hand to greet The Queen at the performance arena.

9. Acts from around the world were invited to perform at the birthday event, which kicked off with a gun salute (pictured).

10. The Queen is the only member of the royal box who doesn’t seem shocked by the thunderous artillery salute that kicked off the show.

11. Prince Philip jokingly covered his ears as the birthday extravaganza got underway.

12. The Duke of Edinburgh and the Duchess of Cambridge laugh following his joke as the Queen watches the proceedings.

13. The Duchess of Cambridge was seated next to the Duke of Edinburgh, with the pair seeming to enjoy a series of jokes.

14. The Duchess of Cambridge wore a white dress and kept warm from the chilly night by layering a red cape coat over the top.

15. The Duke of Cambridge chats to his younger brother Prince Harry during the celebrations at Windsor Castle last night.

16. The Queen's granddaughter Lady Louise Windsor took part in the parade of horses alongside her father, Prince Edward.

17. Also riding in the show to celebrate the Queen's birthday were Princess Anne, left, and her daughter, Zara Tindall, right.

18. Princess Anne smiled to the crowd as she made her way into the arena on her white horse.

19. Singer Gary Barlow performed 'Something About This Night' from the musical Finding Neverland.

20. Actress Imelda Staunton paid tribute to the Queen with a musical performance while horses performed in the parade ground.

21. Dame Helen Mirren, who won an Oscar for her lead role in The Queen, narrated the story of the Her Majesty's teenage years.

22. Singer Katherine Jenkins sung 'I Vow To Thee My Country', left, while Beverley Knight performed during a section on the War.

23. Singer James Blunt, a former captain in the British army, played his hit 'Bonfire Heart' at the gala performance for the Queen.

24. Kylie Minogue wore an embellished white gown for her performance of her hit 'I Believe In You' at last night's gala event.

25. The Australian pop princess wore a white flowing gown during the celebrations, where she was accompanied by a band.

26. A small white pony performed tricks for the audience during a performance by pop singer Kylie Minogue at the gala event.

27. Many said the highlight of the night was the small white pony performing tricks to the Kylie Minogue hit.

28. The Queen looked delighted during the performance by the horses and ponies and was snapped smiling and clapping along.

29. Singer Jess Glynne performed her hit song 'Hold My Hand' as all of the performers made their way back to the arena.

30. Dame Shirley Bassey closed the celebrations with a special performance of her hit song 'Diamonds Are Forever'.

31. The 90th gala celebration also featured over 900 horses, who trained for many weeks for the equestrian performances.

32. The Royal Cavalry of Oman performed with their horses at the event, which also marked the last night of the Windsor Horse Show.

33. The horses and their riders turn to face the royal box, where they wave to the royal family watching the birthday performance.

34. At the end of the show, a giant birthday cake was brought into the middle of the arena to honor the Queen.

35. The gala party ended with all of the international performers holding sparklers while singing Happy Birthday to the Queen.

36. The Queen shook hands with Kylie Minogue, who curtseyed, as Her Majesty thanked the performers for taking part.

37. Her Majesty shakes hands with opera singer Andrea Bocelli, who also performed during the 90th birthday celebrations.

38. The Queen and the Duke of Edinburgh were driven away from the show arena at the end of the night.