Kate Middleton Height?

Kate Middleton is the future princess and queen of England.
I have noticed Kate Middleton is very tall, she's almost the same height as Prince William.
What is Kate Middleton's official height?
I've searched her wikipedia page but I can't find for her height there.

William's height is 6ft 3 or 191cm.
On Kate Middleton's website, katemiddleton.org, her height is 5' 10" (1.78 m.)
Her measurements are 30-23-33.
Kate is so distraught over all of the royal wedding drama, that she’s losing weight, and now Will is worried.