The Spanish royal family consists of King Felipe VI, Queen Letizia, their children (Leonor, Princess of Asturias and Infanta Sofía of Spain), and Felipe's parents, King Juan Carlos I and Queen Sofía. The royal family lives at Zarzuela Palace in Madrid, although their official residence is the Royal Palace of Madrid. The membership of the royal family is defined by royal decree and consists of: the King of Spain, the monarch's spouse, the monarch's parents, and the heir to the Spanish throne.