Leonor, Princess of Asturias (Leonor de Todos los Santos de Borbón y Ortiz; born 31 October 2005) is the elder daughter of King Felipe VI and Queen Letizia of Spain. Leonor is first in the line of succession to the throne. According to the 1978 Constitution, she became heir presumptive upon her father's accession on 19 June 2014, taking the official title of Princess of Asturias and the historical titles of Princess of Girona, Princess of Viana, Duchess of Montblanc, Countess of Cervera and Lady of Balaguer. Her younger sister, Infanta Sofía, follows her in the line of succession, but shall never be Queen if Leonor produces an heir.