The Prince and Princess of Wales joined 20,000 basketball fanatics to cheer on the Boston Celtics and promote the Earthshot Prize awards on their first day in the city.
William and Kate were brought into the TD Garden stadium to sit courtside and watch the action alongside the Celtics owners Wyc Grousbeck and Emilia Faszalari alongside Governor-elect Maura Healey and Boston Mayor Michelle Wu.
Kate and William stood for the national anthem The Star Spangled Banner which was belted out by a semi-finalist of season 10 of the reality TV series The Voice.
But later the royal couple were subject to small pockets of boos around the arena when they were introduced by a stadium announcer and shown on the big screen.
The Boston Celtics’ name was inspired by the Original Celtics, a well-known basketball team that had been created by Irish immigrants in New York earlier in the 20th century, before folding in 1930.
Other fans in the crowd could be heard loudly cheering ‘USA, USA’ when the Prince and Princess appeared on the screens in the center above the court.
But the royal couple kept smiling and took photos with fans while cheering on the high-scoring game and clapping points as the packed crowd ramped up the atmosphere for the 17-time World Champions took on the Miami Heat in downtown Boston.
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Before the game started the royals met members of the ‘Celtics family’, including representatives of the Boston Celtics Shamrock Foundation, which provides grassroots programming and strategic funding to local organizations serving at-risk or at-need populations.
Around the arena, digital advertising boards were lit up green to promote the awards while spectators were treated to a promotional Earthshot video ahead of the game.
After the second quarter with the game tied 47 all, William and Kate watched as the Celtics honored their long- standing tradition of recognizing a ‘Hero Among Us,’ heralding individuals working to positively impact the community.
Ollie Perrault, a 15-year-old climate activist from Easthampton, Massachusetts, got to meet the royal pair after being cheered by the local crowd for her work as a leading member of the Youth Climate Leadership Program since she was 11.
She is now the founder and director of Youth Climate Action Now, committed to fighting for environmental justice, advocating for an intersectional system change, and working to get more young people involved in direct climate action.
Royal aides suggested the royal couple would depart after the third quarter of the game but they decided to stay until the end, shaking hands with fans as they left.
Watch the video below: