Riding for his boss Sheikh Hamdan Al Maktoum, Hanagan was proved right in rejecting their Coral-Eclipse hero Mukhadram in favour of the unbeaten Investec Oaks.
Taghrooda swept past the classy older horses Telescope and Mukhadram in the final furlong to score by three lengths and become only the second filly after Pawneese, in 1976, to win the Oaks and the King George in the same season.
Her trainer John Gosden hinted immediately after the race that the Yorkshire Oaks and the Qatar Prix de l’Arc de Triomphe were the two logical races before she is retired to stud at the end of the season.
“I think after that I’d be confident wherever she goes next,” said Hanagan.
“I was pretty confident all the way round. They went hard up front early but it was very uncomplicated.
“It wasn’t the plan to be that far behind but I managed to fill her up and get her into a nice rhythm and I was always pretty confident.
“She felt like she’d come on a lot since the Oaks, I’d been riding her on the gallops and she felt like a million dollars.
“She’s just so laid back and has an unbelievable temperament. She just lobbed down to the start and had a look about as if it was just a normal day. She’s something else.
“I was always confident she could mix it with the colts. I was a really good decision by Sheikh Hamdan and it was great for racing. It was nice for the public to see her take them on and the Sheikh getting a great reward.
“It was a tough choice to not ride Mukhadram as I’d ridden him in all his 13 races but the 15lb (allowance) for the filly swung it.
“He (Mukhadram) ran a fantastic race and Dane (O’Neill) gave him a peach of a ride. ”