The royal trio is back together again! After charming us with his sweet photo ops at the Invictus Games [1] in Florida earlier this month, Prince Harry [2] reunited with Prince William [3] and Kate Middleton [4] on Monday at London's Queen Elizabeth Olympic Park to launch their Heads Together campaign, an initiative to reduce the stigma surrounding mental heath. Aside from looking picture-perfect in their matching blue ensembles [5], the three also had a little fun as they tried their hand at boxing. While Harry looked like a natural, the Duchess of Cambridge also proved that she's never too princessy to play sports [6] when she threw a few punches. Honestly, is there anything she can't do?