Princess Elena, Crown Princess Letizia, Queen Sofia, Crown Prince Felipe, Princess Sofia, Princess Leonore The Spanish royal family attends a mass to mark Eastern Sunday at Palma de Mallorca's cathedral, in Palma de Mallorca 31-03-2013 Photo: RPE-Albert Nieboer / NETHERLANDS OUT

Spanish Princess Leonor and Princess Sofia pose for the media with Crown Prince Felipe and Crown Princess Letizia as they arrive to Santa Maria de los Rosales school, at the start of the new school year in Madrid, Spain. Photo: RPE-Albert Nieboer / NETHERLANDS OUT

King Juan Carlos, Queen Sofia, Princess Leonore, Crown Prince Felipe, Princess Elena, Princess Sofia, Crown Princess Letizia The Spanish royal family attends a mass to mark Eastern Sunday at Palma de Mallorca's cathedral, in Palma de Mallorca. Palma de Mallorca, SPAIN, 08 April 2012. Photo: Albert Nieboer

MADRID, SPAIN - DECEMBER 27: L-R Princess Letizia, Prince Felipe Queen Sofia, King Juan Carlos of Spain attends the first Parliament session with the new government at the Spanish parliament building on December 27, 2011 in Madrid. Photo: RPE-Albert Nieboer

SS.AA.RR los Principes de Asturias, SS.MM. los Reyes de España, SAR la Infanta Elena, Exmos. Duques de Palma POOL ©Fito Carreto/Copa del Rey Audi Mapfre/RPE-Nieboer

(L) Princess Leonore, Prince Felipe, Princess Sofia, Princess Letizia arrive at the Club Nautico of Palma i the evening. Spanish Royal Family at the 30 th edition of the Sailing regatta Copa del Rey in Palma de Mallorca Photo: Albert Nieboer

Palma de Mallorca, 01-08-2011 Crown Prince Felipe at the Club Nautico Crown Prince Felipe of Spain attends at the sail boat Hispano the 30th edition of the Copa del Rey Audi Mapfre, it starts at the El Real Club N‡utico de Palma. Photographer: A.Ph.van der Werf, Royal Press Europe

(L) Princess Elena, Princess Christina, Crown Prince Felipe, Princess Leonore, Princess Sofia, Princess Sofia, Crown Princess Letizia Spanish royal family attended the Easter Mass to mark Eastern Sunday at Palma de Mallorca's Cathedral, in Palma de Mallorca. Photo: Albert Nieboer

(L) Crown Princess Letizia, Crown Prince Felipe, King Juan Carlos, Princess Elena (behind), Queen Sofia, Princess Christina and Inaki Urdangarin Spanish royal family attends the parade of the National Day Spain. Photo: Albert Nieboer

Princess Leonore (R) and Princess Sofia First school day of Princess Sofia with Princess Letizia at the Colegio Santa Maria de los Rosales in Madrid. It is also the 38th birthday of the Princess. Photo: Albert Nieboer

Spanish King Juan Carlos and Queen Sofia Spanish King Juan Carlos and Queen Sofia during the prize giving ceremony of the 29th Copa del Rey yacht race in Palma de Mallorca the 29th edition of the King's Cup ( Copa del Rey) sailing race in Palma de Mallorca. Photo Albert Nieboer

Spanish Crown Princess Letizia Spanish Crown Princess Letizia arrives at the building of RCNP on the fifth Day of the 29th edition of the King's Cup ( Copa del Rey) sailing race in the yatch club of Mallorca Island. Photo Albert Nieboer

Spanish Crown Princess Letizia, Princess Leonore (R) and Princess Sofia (L) Spanish Crown Princess Letizia and her two daughters Princess Leonore and Princess Sofia picked up Crown Prince Felipe up on the second Day of the 29th edition of the King's Cup ( Copa del Rey) sailing race in the yatch club of Mallorca Island. Photo: Albert Nieboer / Royal Press Europe

Crown Prince Felipe posing with his crew on the CAM Spanish Crown Prince Felipe on the third Day of the 29th edition of the King's Cup ( Copa del Rey) sailing race in the yatch club of Mallorca Island. Photo Albert Nieboer

Crown Prince Felipe, Crown Princess Letizia, Princess Leonore (R) and Princess Sofia Spanish Crown Princess Letizia and her two daughters princess Leonore and princess Sofia went to the building of RCNP to join Crown Prince Felipe on the third Day of the 29th edition of the King's Cup ( Copa del Rey) sailing race in the yatch club of Mallorca Island. Photo Albert Nieboer

Spanish Crown Prince Felipe on the boat he's sailing Start of the 29th edition of the King's Cup ( Copa del Rey) sailing race in the yatch club of Mallorca Island. Photo: Albert Nieboer / Royal Press Europe

Archbishop Teodoro Murgui of Mallorca, King Juan Carlos, Prince Felipe with princess Sofia, Princess Letizia, princess Leonore and Queen Sofia Spanish Royal Family attends Easter Mass at Cathredral of Palma de Mallorca 04-04-2010. Photo: Albert van der Werf

Crown Princess Letizia, Crown Prince Felipe, Princess Elena, King Juan Carlos, Queen Sofia, Princess Christina and Mr. I–aki Urdangarin (Left to Right) MADRID, En La Plaza de Lima, Spanish Royal Family attends celebrations of the national day. National Day Spain12th October is a national holiday in Spain. It is also Saint Day for anyone called Pilar (many Spaniards, especially the older generations, celebrate their saint day more than their birthday). Pilar is the Patron Saint of Zaragoza. Photo: Albert Nieboer

Spanish Crown Princess Letizia Crown Prince Felipe with their daughters Princess Leonor and Princess Sofia pose for the media at the La Seu Cathedral of Palma de Mallorca Photo: Albert Nieboer

Spanish King Juan Carlos (red cap) sailing at the yatch Bribon Second day of the 28th edition of the King's Cup ( Copa del Rey) sailing race in the yatch club of Mallorca island. The regatta Copa del Rey Audi Mapfre. A total amount of 110 boats, from 19 countries, will strive to win the most important regatta of the Mediterranean. Photo: Albert Nieboer

Spanish Crown Prince Felipe and Crown Princess Letizia a Minute of Silence will be observed in Plaza San Pedro Start of the 29th edition of the King's Cup ( Copa del Rey) sailing race in the yatch club of Mallorca island. The regatta Copa del Rey Audi Mapfre. A total amount of 110 boats, from 19 countries, will strive to win the most important regatta of the Mediterranean. Photo: Pool

Spanish Royal Family attend Easter Sunday service in Palma, that there will officiate the bishop of Mallorca Jesus Murgui in the Cathedral Photo: Albert Nieboer

12-10-2008 MADRID National Day of Spain Arrival at the la plaza de Colon of the royal family, King Juan Carlos, Queen Sofia, Crownprince Felipe (in uniform), Crownprincecess Letizia (in white), Princess Elena (in black), Princess Christina with her husband mr. I–aki Urdangarin for the military parade. © Albert Nieboer - Royal Press Europe

FRANKFURT, 22 nd September 2008 Prince Felipe and Princess Letizia opened today the Instituto Cervantes in Frankfurt. © Royal Press Europe - Albert nieboerFRANKFURT, 22 nd September 2008 Prince Felipe and Princess Letizia opened today the Instituto Cervantes in Frankfurt. © Royal Press Europe - Albert nieboer

Zaragosa 24 th June 2008 Spanish Royal Family visited the Expo 2008. King Juan Carlos, Queen Sofia, Prince Felipe, Princess Letizia, Princess Elena, Princess Christina with her husband mr. I–aki Urdangarin Liebaert. Expo 2008 is an international exposition held from 14 June to 14 September 2008 coordinated by the Bureau of International Expositions, the organization that is responsible for sanctioning World's Fairs, held in Zaragoza, Spain, with the topic of "Water and sustainable development". The event is being placed in a meander of the river Ebro. © Royal Press Europe-Albert NieboerZaragosa 24 th June 2008 Spanish Royal Family visited the Expo 2008. King Juan Carlos, Queen Sofia, Prince Felipe, Princess Letizia, Princess Elena, Princess Christina with her husband mr. I–aki Urdangarin Liebaert. Expo 2008 is an international exposition held from 14 June to 14 September 2008 coordinated by the Bureau of International Expositions, the organization that is responsible for sanctioning World's Fairs, held in Zaragoza, Spain, with the topic of "Water and sustainable development". The event is being placed in a meander of the river Ebro. © Royal Press Europe-Albert Nieboer