This year will probably mean family time for her and Prince William. After the hustle and bustle of a Sandringham Christmas and New Year in Bucklebury with the Middletons, the Duke and Duchess of Cambridge will probably relax in their newly refurbished Kensington Palace apartment with Prince George.
Click on photo for full gallery
It may be that William has a special treat lined up for his wife as he is particularly thoughtful when it comes to gifts.
To find out how the royal has marked her birthday in the past take a look at this special HELLO! Online report.