The reality TV star said she and the team at her online shoe company designed the heels, called The Duchess, in honour of the royal birthday. "I just wanted to wish the Duchess of Cambridge a really happy 30th birthday," Kardashian, chief fashion stylist at ShoeDazzleUK, said in a video to promote the shoes.

"Her style, I love personally, and I think that every woman should feel like a princess every day," she added. The 4.5-inch black heel with a concealed platform is priced £39.95 ($60.50) in the UK and is described by the retailer as delivering an "understated air of opulent elegance, looking both high fashion and high society". Prince William's wife is reportedly celebrating her birthday with a 1980s-themed party organised by her sister Pippa Middleton and brother-in-law Prince Harry, according to Grazia magazine.