Francisco Goya, Charles IV of Spain and His Family (1800–1801). Collection of Museo Nacional del Prado.

Prince Charles and Queen Letizia. Photo: Getty He's a future King and she's a Queen, but Prince Charles and Queen Letizia of Spain greeted each other like dear friends.

Then-Prince Charles, Princess Diana, and Princes William and Harry with the Spanish royal family at the Marivent Palace, August 1987.

Horacio Villalobos/Corbis/Getty King Felipe received his first dose of the COVID-19 vaccine in May 2021. The announcement of his diagnosis coincides with Spain's plan to drop outdoor mask mandates.

Juan Carlos, king of Spain, announced last week—in a surprise decision—that he would be abdicating the throne, handing the proverbial royal baton to his 46-year-old son, Felipe.