Prince William flashed the biggest smile when he accepted an adorable gift for his newborn daughter, Princess Charlotte, on Sunday. He and his brother, Prince Harry, participated in the Audi Polo Challenge in London, where they shared some sweet brotherly moments throughout the day. After hitting the polo field together, the pair posed for pictures with other players and Prince William received a cute present for his baby girl: a tiny pair of pink Hunter rain boots. He was all smiles when he opened the gift, lifting them up to show the crowd.
Another fun moment came when the royals met Chris Hemsworth and his family, lighting up as they spoke to Elsa Pataky and the couple's daughter, India Rose. Later, Will and Harry walked together, with Harry sweetly putting his arm around his big brother. Keep reading for the best pictures of their day out, then see the cutest pictures of Princess Charlotte — so far!