After the race finished, Queen Elizabeth made her way to the winner's circle, where she was scheduled to present the cup to the victor before she won the award herself.
"This her passion and her life and she's here every year and she strives to have winners," said the queen's grandson, Peter Phillips.
"To win the big one at Royal Ascot means so much to her. Everyone is just thrilled, it's very close to her heart and today is very special."
"It's great to ride any winner for the Queen but to do it in the Gold Cup is very special," said Estimate jockey Ryan Moore.
Since she obviously couldn't present the trophy to herself, the queen's son Prince Andrew awarded his mother with the Gold Cup.
Her Majesty was very pleased with the trophy.
Very, very pleased.
Watch the queen's adorable reaction to Estimate's victory. She gets a little teary.