RoyaltyGalleryIn 9 photos: Princess Leonor and Infanta Sofia's cutest twinning momentsKing Felipe and Queen Letizia's daughters are two years apart in age
GalleryLook how they've grown! Princess Josephine, Prince Christian, Princess Alexia then and nowThe next generation of European royals are preparing for their futures
Princess Leonor twins with mother Queen Letizia in skinny jeans for rare family photoThe Spanish princess posed with Queen Letizia, King Felipe, and Infanta Sofía
Queen Letizia and King Felipe share incredible family photos to mark 20th wedding anniversaryThe Spanish royals tied the knot in 2004
GalleryRoyal kids in adorable matching outfits: Mia and Lena Tindall, Prince George and Princess Charlotte and morePrincess Kate's children aren't the only royal siblings to twin in matching clothes
12 unique royal baby names - all about their secret meaningsPrince Archie and Sienna Mapelli Mozzi aren't usual royal names
Queen Letizia keeps eye out for daughter Princess Leonor, 18, as they mark important eventPrincess Leonor is currently undertaking military training at the Zaragoza Military Academy
Meet the Spanish royal family tree – all you need to know about the House of BourbonKing Felipe's father, Juan Carlos, was the first ruler following the restoration of the monarchy
Princess Leonor twins with mother Queen Letizia in jeans for under the radar outingThe young Spanish royal was also spotted with her father King Felipe for a casual evening out
Queen Letizia exudes glamour in super cinched wrap dress and daughter Princess Leonor's accessoryKing Felipe's wife looked so elegant in cornflower blue
GalleryRoyal Style Watch: From Princess Eugenie's designer look to Duchess Sophie's leg-lengthening Victoria Beckham suitThe royal style set have seriously delivered this month
GalleryPrincess Leonor is so poised in military uniform for royal first supported by King Felipe VI and Queen LetiziaThe future Queen of Spain took on the challenge of her Military Easter debut
Queen Letizia steps out for special occasion with lookalike daughter Princess LeonorThe Spanish Queen and her daughter look like twins
Princess Leonor is every inch a future queen in symbolic power suit on 18th birthdayThe daughter of King Felipe and Queen Letizia was feted the future queen
Princess Leonor steps into the spotlight on milestone birthday for historic swearing-in ceremonyThe Spanish royal is following in her father King Felipe's footsteps
Queen Sofia breaks down in tears ahead of Princess Leonor's milestone momentPrincess Leonor turns 18 on Tuesday 31 October
Princess Leonor displays sisterly bond with Infanta Sofia in twinning outfitsKing Felipe and Queen Letizia's daughters are only two years apart in age
King Felipe and Queen Letizia reunite with Princess Leonor and Infanta SofiaPrincess Leonor and Infanta Sofia now live in different countries
Princess Leonor wears cadet uniform to receive special honourPrincess Leonor is in the first year of her military training
Princess Leonor stuns in military uniform as she begins first day of new schoolPrincess Leonor, 17, is currently the heir to the Spanish throne
Queen Letizia and King Felipe share emotional farewell with Princess LeonorPrincess Leonor graduated from UWC Atlantic College in May
Queen Letizia twins with doppelganger daughters in head-to-toe silkPrincesses Sofia and Leonor put their own stamp on their mother's look
Queen Letizia steps out with her lookalike daughters during summer holidayKing Felipe and Queen Letizia are parents to Princess Leonor and Infanta Sofia
Princess Leonor, 17, visits military school with King Felipe and Queen LetiziaPrincess Leonor graduated from UWC Atlantic College in May
Royal siblings who share the closest bondFrom Princess Beatrice and Princess Eugenie to Prince George, Princess Charlotte and Prince Louis
Queen Letizia coordinates in pink with family at Infanta Sofia's confirmationKing Felipe and Queen Letizia celebrated Infanta Sofia's confirmation at Asuncion de Nuestra Señora church
Queen Letizia and King Felipe's joint celebration after Princess Leonor's graduationPrincess Leonor has completed her studies at UWC Atlantic College
Joy for Queen Letizia and Queen Maxima as daughters mark major achievementQueen Letizia of Spain and Queen Maxima of the Netherlands were both overjoyed
Princess Anne visits Princess Leonor's college - and it's set in a stunning castleThe Princess Royal carried out engagements across Wales on Monday
Queen Letizia and King Felipe share big announcement about Princess Leonor's futurePrincess Leonor is currently studying in Wales
UWC Atlantic College – Inside the exclusive school in Wales loved by European royalsAtlantic College is an independent boarding school with a famous roster
Meet the 6 royals who are destined to be future queens of EuropeCrown Princess Victoria and Princess Leonor will one day rule
Queen Letizia shares family Christmas card - and it's very autumnalPrincess Leonor and Infanta Sofia take centre stage
Queen Letizia's daughter Princess Leonor stuns in sequin mini dress - and it may be her most stylish look yetThe Spanish royal is taking after her mother's chic style...
Queen Letizia and lookalike daughter Princess Leonor twin in lace blouseThe royals wore the same & Other Stories blouse
Queen Letizia's daughter Princess Leonor rocks white mini dress in family photosFans around the world want Princess Leonor's pretty dress
Infanta Sofía gets the sweetest surprise during Spanish royal family outingThe teenager accompanied King Felipe, Queen Letizia and Princess Leonor
Queen Letizia reunited with Princess Leonor for the first time since UK moveThe 15-year-old royal looked thrilled to be with her parents and sister again
Spain's Princess Leonor shares photos from inside new college and it looks just like a fairytaleA college that's fit for royalty!
King Felipe and Queen Letizia bid farewell to Princess Leonor at airportThe young royal, 15, is starting college in the UK
Princess Leonor of Spain and Princess Alexia of the Netherlands' proud parents send them off to college in WalesBy Zach Harper
Princess Leonor and Princess Alexia set for a huge move this monthIt's all change for the young royals