The trio, who have collectively made mental health a focus and priority of their work, announced the initiative back in April, explaining it would bring together a number of charities with the common goal of ending stigma surrounding mental health.
The launch on Monday at Queen Elizabeth Olympic Park in London included speeches, interactive games, a "what makes you happy?" wall and more. But arguably none of those things were more fun to watch than when each of the three royals had a go at a some boxing, to demonstrate a physical exercise that can improve mental health.
Kate made it look easy in a now-sold-out (of course) Banana Republic skirt:
And William gave it his best shot:
But their skills seemed to pale in comparison to those of Prince Harry, who Monday continued his campaign to not only to raise awareness but to also be the most swoon-worthy royal of them all:
As if that weren't enough, Harry also tried his hand at a bit of DJ'ing by adding songs to a "Head Mix." Support network The Mix reported Harry's pick was "Runnin'" by Naughty Boy, while Kate chose Emeli Sande's "Heaven."
Leave it to these three to really roll with the punches, eh?