Bryony Frost became the first female jockey to win the King George VI Chase, riding Frodon to victory at Kempton.
The 20-1 chance led throughout the three-mile race and held off the fast-finishing Waiting Patiently (12-1), ridden by Brian Hughes, to give trainer Paul Nicholls his 12th King George win.
Hat-trick-chasing Clan Des Obeaux, the 85-40 favourite, was back in third.
“I have had the absolute best time going round there on him,” said a delighted Frost.
“He has just smashed everyone’s expectations. I don’t argue with him too much as he is his own personality.
“I cannot stress how much this horse means to me – he is my life. You dream as a little girl to ride a horse like this.”
The win gave Frost her 175th career win, making her become the most successful female National Hunt jockey of all time.
Frost and Frodon had also made history at the 2019 Cheltenham Festival, winning the Grade One Ryanair Chase.