Prince Harry, Kate Middleton, Prince William at London Marathon

Prince Harry was the royal hugger-in-chief Sunday as he joined the Princess Kate and Prince William as they cheered on runners at the start of the London Marathon

Prince Harry, Prince William, and Kate Middleton cheered on London Marathon runners with water bottles and hugs - HelloGigglesHelloGiggles

Kate Middleton Talks Spider-Man and Prince William with Her Hold Still Book

Duchess of Cambridge, Prince William and Prince Harry Compete To Be Crowned Winner In Charity Running Race

William, Kate and Harry attend the 2017 London Marathon

Revealed: Prince Harry's Funny Wedding Gift to William and Kate

Duchess Catherine, Prince William and Prince Harry attend Virgin Money London Marathon

Prince William, Harry, Duchess Kate Face Off in Charity Race

Kate cheered on Prince William and Harry during the London Marathon, Proof That Kate Middleton Had a Pretty Flawless Year

Prince William Gets Water Splashed at London Marathon PHOTO

Duchess Catherine, Prince William and Prince Harry attend Virgin Money London Marathon

Kate Middleton steps out in €1,200 floral Erdem dress at charity event with Princes William and Harry