She is the daughter of photographer Matthew Donaldson and wife Tiffany. Since being scouted by Select model agency in 2003 while shopping in Camden, she has become one of Britain's leading models, landing campaigns for Jil Sander and Burberry among others.
In 2005, Donaldson was nominated for Best Model at the British Fashion Awards, but was beaten by Karen Elson.
She is close friends with model Gemma Ward.
"I still feel like a kid inside though," she insists.
Oh... so her birthday is actually on the 27th, not the 26th.
She also shares the same birthday as me :O