Queen Elizabeth's eldest grandson, Peter Phillips, is engaged to Harriet Sperling. The two announced that they had taken the next step in their relationship on August 1, 2025. The royal proposed with a three-stone diamond engagement ring that's estimated to cost $42,000.

Peter Philips announced his engagement to Harriet Sperling on Aug. 1, and he proposed with a ring that would have made his grandmother proud. The eldest grandchild of the late Queen Elizabeth and Prince Philip, Peter selected the engagement ring from the world-famous Mayfair jeweler Pragnall, which has major connections to the royal family.