Kim Kardashian wants to have a similar wedding dress to Duchess Catherine's.

The 'Keeping Up with the Kardashians' star is a huge fan of the British royal - who was known as Kate Middleton before her marriage to Prince William - and is planning to walk down the aisle in a frock based on the Sarah Burton for Alexander McQueen gown worn by the Duchess for her nuptials in 2011.

A source said: ''Kim is absolutely obsessed with everything Kate and William do. She considers her own family 'American Royalty'. Kim loves Kate's style and while she is planning on several gowns for her big day, she wants the one for the ceremony to look something like Kate's dress. The brief is demure princess and she'll also wear a tiara.''

Meanwhile, Kim and her fiance Kayne West - who have six-month-old daughter North together - are planning to sit on golden ''thrones'' during their reception as they believe it will tie in nicely with the royal-themed home they share in California.

The source told Grazia magazine: ''They think it'd be really cool to have gold thrones to sit on during the reception. They've already got a Buckingham Palace-themed room in their new home, which they're using as inspiration.''