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William and Kate are visiting Boston to attend Fridays' awards ceremony for the Earthshot Prize, an initiative William launched in 2019 to create solutions for environmental problems.

During the Celtics game, promos for the Earthshot Prize were shown on the Jumbotron and a 15-year-old climate activist from Massachusetts was recognized as the game's \"Hero Among Us.\"

William and Kate were spotted speaking with the young climate activist for a few minutes on the court after she was recognized, and also spoke with fans throughout the game.

\"PHOTO:
Brian Snyder/Reuters
PHOTO: Governor-elect Maura Healey, Britain's Prince William, and Catherine, Princess of Wales attend the NBA game between the Boston Celtics and the Miami Heat, at TD Garden in Boston, Nov. 30, 2022.
>

Attending an NBA game has become something of a tradition for William and Kate during their visits to the U.S.

When the couple visited New York in 2014, their most recent trip, they attended a Brooklyn Nets game, during which they met Beyoncé and Jay-Z.

While not an official royal tour, William and Kate's trip to Boston is seen as an important one, both because the Earthshot Prize is a passion project for William and because this is a transitional time for the monarchy under William's father, King Charles III, according to ABC News royal contributor Victoria Murphy.

\"I think this trip will be an interesting one because the monarchy has had a lot of criticism in the past few years,\" said Murphy. \"The picture is very different to when William and Kate visited the U.S. in 2014, so this trip could be seen as an opportunity to gauge how the U.S. public feels about the working royals and the monarchy right now and what that might mean for the royal family globally.\"

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