For a couple whose relationship had been so very public, Prince William and Princess Kate Middleton were able to keep their October 20, 2010, engagement private - for nearly a month. It helped that it happened on another continent. While holidaying with friends for a few weeks at Kenya's Lewa Wildlife Conservancy, he took his love up to a log cabin on Mount Kenya, where he got down on one knee and presented her with his late mother Princess Diana's engagement ring. "There's a true romantic in there," Kate later said. Who Was Involved Only the most recognizable couple in the world.