Prince William was spotted wildly celebrating, dancing and singing as his side Aston Villa claimed a huge win on Friday morning (AEST).
Villa beat Nottingham Forest 4-0 in the second leg of their Europa League semi-final tie to claim a 4-1 aggregate victory.
Watch the footage of Prince William via the player below
They will now face Freiburg in the final on May 21 as they bid to end their 30-year trophy drought.
And the Prince of Wales, 43, a lifelong Villa supporter, could not have been more overjoyed as Villa booked their place in the showpiece event in Istanbul later this month.
He was first seen celebrating passionately when Emi Buendia’s penalty put Villa 2-1 up on aggregate, hugging and embracing those sat around him.
Then, at the full-time whistle, the cameras cut to him again as he sang and danced to Neil Diamond’s classic track “Sweet Caroline”.
And fans on social media were loving William’s joyous behaviour as they poured in to praise the Royal.
One said: “William is living his best life.”
Another added: “Aww how nice! —he looks so happy and relaxed!”
The 44 replied: “Prince William goes MENTAL as Villa take the lead. Football really is for EVERYONE.”
While another account responded: “Prince William is as giddy as a child on Christmas morning.”
Villa manager Unai Emery also revealed William was in the changing room after the match as he joined in with the players’ jubilant celebrations.
Emery said” “He (William) was in the dressing room with the players and with me. He was so happy!”
Villa’s last major trophy came way back in 1996 when they beat Leeds 3-0 to win the League Cup.
Spanish manager Emery is eyeing a fifth Europa League of his coaching career, having already lifted the trophy three times with Sevilla and once with Villarreal.
Villa will be huge favourites to beat Freiburg — a victory that would also guarantee Champions League qualification, though they are poised to seal a spot through their Premier League finish.