Prince William was overcome with emotion in the late hours of Wednesday evening as Aston Villa secured a commanding 3-0 victory against Freiburg in the Europa League final.
The heir to the throne, watching from the stands at Besiktas Stadium, was spotted celebrating with unbridled joy alongside friends when the Villans took the lead.
As the match progressed and Villa's triumph became certain, the royal supporter found himself wiping tears from his eyes, visibly moved by the magnitude of the occasion.
The victory marks the club's first major silverware in three decades, ending a painful drought for their most famous fan.
Prince William cried as he became overwhelmed with emotion during the Aston Villa match
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Youri Tielemans opened the scoring for Villa, prompting jubilant scenes in the royal box, before Emiliano Buendia doubled the advantage shortly afterwards.
Morgan Rogers added a third goal in the second half to complete the rout and secure the club's first major European honour in 44 years.
Following the final whistle, William composed himself sufficiently to pose with the trophy alongside manager Unai Emery.
The football-mad royal subsequently took to social media to declare his allegiance, writing: "Amazing night!!
Prince William roared alongside his friends during the match
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"Huge congratulations to all the players, team, staff and everyone connected to the club! Up the Villa, Villa 'Til I Die. W."
William had been granted access to the dressing room before kick-off, prompting captain John McGinn to joke about the royal's potential contribution to the post-match festivities.
McGinn quipped: "Hopefully Prince William is paying for the free bar. He's just a normal guy, and it's great to have his support.
Prince William reacts in the stands before the match
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"He can have a couple of drinks with us and maybe get his credit card out tonight!"
The triumph brings an end to a frustrating run for William, who had previously witnessed Villa suffer defeat in four successive cup finals.
For Emery, the victory represents his fifth Europa League title, having previously lifted the trophy three times with Sevilla and once with Villarreal.