Are These the Cutest Photos of Kate Middleton and Prince William Ever?

From black-tie looks at Buckingham Palace to coordinated couple outfits on royal tours, we're used to seeing Prince William and the Duchess of Cambridge dressed to the nines in impeccable ensembles. What's rarer is to see the royal duo in a laid-back environment, so our ears immediately perked up when we heard the famous couple participated in an adorable race over the weekend.

They attended a training session to support their charity Heads Together, which is sponsoring this year's London Marathon. In the spirit of the event, they engaged in some friendly competition—and cute photo opportunities ensued. (Spoiler alert: Prince Harry actually won the race!)

Scroll down to see Kate Middleton and Prince William race each other in support of their charity Heads Together!

What's your favorite Kate Middleton and Prince William moment of all time? Tell us in the comments below!

Opening Image: Getty Images