The duchess and the prince have both been to see the animal at the Royal Stud in Sandringham, Norfolk.
They are expected to register new joint racing colours next year and Royal Superlative will run on the flat as a two-year-old in 2008.
In 2015, Mengoni released the albums Parole in circolo and Le cose che non ho, which were part of the same artistic project, also including the live record Marco Mengoni Live.
During his career, Mengoni has received several awards, including two TRL Awards, nine Wind Music Awards and nine MTV Italian Music Awards.
Io sono entrambe queste cose, Romina Carrisi Power”.
Royal Superlative, named by the duchess who has a love of horse racing that goes back more than 30 years, is a one-year-old filly.
It means that they will become racehorse owners together for the first time.
The song was included in his second extended play, Re matto, which debuted at number one in Italy.
The EP was promoted through an Italian tour, which yielded the live album Re matto live.