Princess Leonor was reunited with her parents and sister as she returned to Spain for the first time since moving to the UK to study in August.
The princess looked elegant in a fuchsia dress and sling-back heels for the occasion, while her younger sister Sofia complemented her in a teal number.
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Meanwhile, Queen Letizia chose a grey dress with an on-trend feathered trim and metallic heels.
On Friday, the Spanish royal family then stepped out for the award ceremony of the Princess of Asturias Prize, where Leonor matched her mother in a grey shift dress, and Sofia donned a cream polka dot ensemble.
The Spanish royal family at the concert
Leonor's official royal title is Princess of Asturias and she is the heir to the Spanish throne. When she ascends the throne, she will be Spain's first queen regnant since Isabella II, who reigned from 1833 to 1868.
The teenager is studying for her International Baccalaureate at the UWC Atlantic College in Llantwit Major, Wales, for the next two years.
Leonor joined her family at the prize ceremony
UWC Atlantic College is set in the 12th century St Donat's Castle on the southern Welsh coast and campus facilities include a library, woodland, an indoor and outdoor swimming pool, and classrooms within historic buildings.
The Spanish royal court shared some moving images of Leonor as she bid farewell to her family at the airport before boarding her flight to the UK, as well as photos of the royal inside the college grounds as she began her studies.
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