The Duke and Duchess of Cambridge's Most Romantic Moments

1. When Prince William and Kate Middleton announce their engagement in 2010.

Prince William and Kate Middleton announced their engagement at the end of 2010. It was the beginning a veritable fairytale...

2. The Duke and Duchess of Cambridge married at Westminster Abbey on April 29, 2011.

All eyes were on Kate and that fabulous Alexander McQueen dress.

3. ...Then they kissed on the balcony at Buckingham Palace, with 3 billion people watching worldwide.

4. Kate and Wills wear matching outfits during their 2011 Tour Of North America. Yee haw!

5. Kate is proud as Prince William scores four goals at Santa Barbara Polo Club in a charity polo game.

6. Kate Middleton and Prince William at the Olympics

'Go Team GB!' Kate and Will embrace as they cheer on Britain during the Olympics. Love it!

7. The Duke and Duchess of Cambridge always look so happy together.

8. The Duke and Duchess of Cambridge swap luxury transport for, um, a car inside a boat. As you do.

9. Kate and Wills leave the Lindo Wing of St Mary's Hospital in London as their baby boy is born!

Prince George of Cambridge was born on July 22 2013.

10. Their baby boy Prince George was christened in London on October 23, 2013.

11. Happy family: The Duke and Duchess of Cambridge release an official family portrait.

Prince George looks lovingly at their dog Lupo in the adorable photograph.

12. Kate and William attend Princess Charlotte's christening after welcoming their second child.

Picture: PA

13. Princess Charlotte is pictured in her first family portrait in stunning Mario Testino shots.

Picture: PA/ Mario Testino / Art Partner

14. The Duke and Duchess of Cambridge enjoy a ski break with their kids.

The Duke and Duchess of Cambridge with their children, Princess Charlotte and Princess George, enjoy a short private break skiing in the French Alps. Picture: PA

15. The Duke and Duchess of Cambridge play in the snow together.

The Duke and Duchess of Cambridge with their children, Princess Charlotte and Princess George, enjoy a short private break skiing in the French Alps. Picture: PA

16. Kate and Prince William feed baby elephants during royal tour of India.

The Duke and Duchess of Cambridge feed baby elephants during a visit to the Centre for Wildlife Rehabilitation and Conservation in Kaziranga, India, on day four of the Royal tour to India and Bhutan.

17. Kate and Prince William look at each other lovingly during royal visit to India.

The Duke and Duchess of Cambridge during a visit to Pan Bari Village at Kaziranga National Park, in Assam, India, on day four of the Royal tour to India and Bhutan.

18. Kate and Wlliam trek to the tiger's nest monastery Bhutan.

Picture: PA

19. William and Kate retrace Diana's steps at the Taj Mahal.