Prince William, Kate and Prince Harry attended the London Marathon on Sunday - their first as a trio. The royals cheered on the 39,000 plus runners who took part in the 26.3 mile race, while also shining a spotlight on their mental health campaign Heads Together.
Heads Together was the marathon's charity of the year and William, Kate and Harry were hoping that 2017's event would be recognised as 'the mental health marathon' that gets the country talking about the issue.
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The royals, all sporting matching Heads Together tops, were in charge of kicking off proceedings.
William, Kate and Harry stood at the start line and cheered on the waves of runners.
William showed off his playful nature, blowing a red horn at his wife Kate.
The royals, who stayed for the entire race, got into the sporting spirit, enthusiastically cheering on participants.
Cheeky Prince Harry sprayed a bottle of water at his brother William as they watched from the sidelines.
The Duchess, who was attending her first Marathon in a royal capacity, was easy to spot with her big foam finger.
Kate was in her element, high-fiving runners as they sped past.
At the end of the race, the royals helped hand out medals to runners.
Over 700 Heads Together runners took part in the race, with more than 39,000 runners competing overall. William, Kate and Harry met the runners and posed for a big group photo.
Harry sweetly hugs a Heads Together runner.
Prince Harry, who is patron of the London Marathon Charitable Trust, posed with men's elite race winner Kenya's Eliud Kipchoge and women's elite race winner Kenyas Jemima Sumgong.
Harry at the winners' presentation, pictured with wheelchair winners Britain's David Weir and Switzerland's Manuela Schar.
Harry pictured with Kenya's Daniel Wanjiru and Kenya's Mary Keitany.