Kate aged three and a half enjoying the outdoors on a holiday in the Lake District.
Here's Kate (left) aged four with her father and sister Pippa in Jerash, Jordan.
Smiling for the camera, Kate is five years old in this photo.
Kate on her graduation day at St Andrews University. She graduated with a degree in Art History.
And here she is with Prince William on their graduation day at St Andrews University, June 2005.