Kate Middleton's chemotherapy treatment "must have been pretty lonely," a royal insider tells PEOPLE in this week's exclusive cover story.

Kate Middleton has reportedly made first big effort of this year to reconcile with estranged brother-in-law, Prince Harry and ...

The Princess of Wales was spotted browsing in a store in London's trendy Notting Hill during a solo shopping trip - just a week after revealing she is in remission from cancer ...