Duchess of Cambridge, Prince William and Prince Harry compete in running race for charity

PRINCE William may be closer in line to the British throne, but brother Prince Harry had him covered on the track.

WHO would win in a race between Wills, Kate and Harry?

Well, Prince William may be closer in line to the British throne, but brother Prince Harry outsmarted him at the finish line.

Harry, William and the Duchess of Cambridge raced a 50-metre sprint against each other Sunday at London’s Queen Elizabeth Olympic Park as they promoted a mental health campaign called Heads Together.

Cheered by track stars and amateur runners training for April’s London Marathon, Harry crossed the line a stride ahead of his older brother.

Prince William complains about his hamstring pre race. Picture: Jackson/Getty Images

Prince William tries to put off his wife at the starting line. Picture: Alastair Grant/Getty Images

The two princes get competitive as William strays into Kate’s lane. Picture: AP Photo/Alastair Grant

The Duchess of Cambridge showed great form. Picture: Chris Jackson/Getty Images

Harry smells success. Picture: AP Photo/Alastair Grant

Catch him if you can - Prince Harry pulls away from his brother and sister-in-law. Picture: AP Photo/Alastair Grant

William and third place getter Kate hugged at the finish.

Perhaps aware he would be beaten by his more athletic sibling, Prince William had quipped moments before the start: “Oh, my hamstring!”

One spectator, women’s marathon world record-holder Paula Radcliffe, joked afterward that William should have been disqualified for straying into Kate’s lane.

Still friends. Picture: AP Photo/Alastair Grant

Originally published as Duchess of Cambridge, Prince William and Prince Harry compete in running race for charity