What do you do on a too-beautiful-to-believe summer day in New York City?Head to Governors Island to watch HRH Prince Henry of Wales (Prince Harry to you and me) play polo, of course. This past Saturday, May 30, I was lucky enough to have been the guest of Frits van Paasschen, President and CEO of Starwood Hotels & Resorts and St. Regis New York’s brand new British General Manager, Paul Nash, at the star-studded charity event.

Just a few of the celebs who turned out to see the Prince go head to head with smoldering Argentine polo phenom Nacho Figueras: A fedora-clad Madonna (with sons David and Rocco, the later sporting a mohawk), Kate Hudson, Chloe Sevigny (in creamy Chloe), LL Cool J (in a handsome brown Kangol for his first-ever polo match), model Alek Wek (wearing a canary yellow frock and a coordinating orange cast on her wrist), designers Marc Jacobs and Donna Karan, and my Today Show pal Matt Lauer. St. Regis New York sweetened an already memorable day by serving its classic Afternoon Tea, courtesy of Adour pastry chef Sandro Micheli, just as Prince Harry claimed the winner’s trophy.

Nilou Motamed is the features editor at Travel + Leisure.