Princess Charlotte met with members of the Spanish Royal Family, including Princess Leonor and her younger sister Infanta Sofia.
Princess Leonor, who is the heir to the Spanish throne, posed for pictures alongside Princess Charlotte and Prince William in Switzerland.
The royals were in Basel to watch Spain and England in the Women's Euros final.
The Lionesses won the match on penalties after it finished 1-1 after extra time.
Princess Charlotte met with members of the Spanish Royal Family, including Princess Leonor and her younger sister Infanta Sofia on Sunday.
|Spanish Royal Family
As Patron of the Football Association, Prince William was on the pitch to present medals to both the Spanish and English players after the match had concluded.
Princess Leonor and Infanta Sofia were pictured consoling the Spanish players after the defeat.
Following the match, Princess Charlotte and Prince William issued a rare joint statement congratulating the Lionesses.
The statement read: "What a game! @lionesses, you are the champions of Europe and we couldn’t be prouder of the whole team. Enjoy this moment @England."
Princess Leonor, who is the heir to the Spanish throne, posed for pictures alongside Princess Charlotte and Prince William in Switzerland.
|Kensington Palace
Marking a royal first, the congratulations were signed off: "W & Charlotte."
King Charles also issued a statement on behalf of the Royal Family, congratulating the England team on their second European title.
The King said: "This brings you, your manager and all your support team my most heartfelt congratulations on winning the EUROS 2025.
"For more years than I care to remember, England fans have sung that famous chant 'football's coming home'.
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King Charles also issued a statement on behalf of the Royal Family, congratulating the England team on their second European title.
|Getty
"As you return home with the trophy you won at Wembley three years ago, it is a source of great pride that, through sporting skill and awesome teamwork, the Lionesses have made those words ring true."
He continued: "For this, you have my whole family's warmest appreciation and admiration.
"More than that, though, you have shown through your example over past weeks that there are no setbacks so tough that defeat cannot be transformed into victory, even as the final whistle looms. Well done, Lionesses.
"The next task is to bring home the World Cup in 2027 if you possibly can! Charles R".