And given that the £38.95 moccasin-style shoes from Spanish e-tailer Pisamonas are almost sold out, they might in fact be onto something.
Fashion blog What Kate’s Kids Wore made the discovery after contacting the brand on Twitter.
— WhatKatesKidsWore (@KatesKidsWore) September 8, 2017
Hello! Based on recent orders, we think it may be the case, yes ☺️
— pisamonas_UK (@pisamonas_UK) September 8, 2017
“Based on recent orders, we think it may be the case, yes,” was the reply from Pisamonas UK.
Now royal fans appear to be flocking to the website to purchase those same leather shoes worn by the third in line to the throne.
According to the Pisamonas website, the shoes come in black and navy blue and are described as “classic and elegant moccasins, premium quality and easy to combine.”
But if you want to get your hands on a pair, you have to be quick, as most of the sizes are sold out, and the shoe is listed as having low availability.
Looks like the young royal has sparked a sales surge for the brand.
Read more from Yahoo Style UK: