Kate Middleton didn't wear her engagement ring that once belonged to Princess Diana at the Royal Marsden Hospital in London on Jan. 14. Inside why and more about Princess Kate's new ring.

When you picture the royals, we wouldn’t be surprised if the first thing that comes to mind is their dazzling style. From extravagant gowns to expensive jewelry — or in Princess Diana’s case, her impeccable streetwear style — the royals always come dressed for success from head to toe.

Kate Middleton just became an official patron of the hospital where she received preventative chemotherapy treatment, marking her first royal engagement of the year. During the outing, Kate visited with patients at the Royal Marsden Hospital,