Frankel's foal goes up for auction in just over an hour.
Together with his mother, Crystal Gaze, who is expecting a second foal by the undefeated Newmarket racehorse, he could fetch more than £1m at the auction at Kensington Palace.
Henry Beeby, chief executive at auctioneers Goffs, said: "Frankel was the greatest racehorse we had ever seen. He was undefeated. He was spectacular. And he was an absolute star.
"It's a bit like Usain Bolt turning up at stud."
Click below to hear more from Henry Beeby.
More top news
Cloudy overnight in the Anglia region with some rain. Becoming fine and dry on Monday.
Saints face trip to Clermont Auvergne after heavy loss against Racing Metro
Police in Essex have offered their support to a woman and her family after she was dragged into bushes and raped near a supermarket.