North West owns a $20,000 coat

A source said: "Kim and Kanye see North as an extension of themselves, so it's no shock that she is the most glamorous baby on the planet. They are addicted to spoiling her.

"Nori has more than $1 million worth of designer clothes, and a lot of them are custom-made. She's got tons of Givenchy, Gucci, Louis Vuitton.... She even has a fur coat designed especially for her by Karl Lagerfeld that cost $20,000.

"Kanye has managed to get Hermes to design a mini Birkin bag for North because Kim's already started a handbag collection for her."

North has also an expensive jewellery collection, including a ruby and pearl necklace that the rapper insured for $500,000 after he bought it in Paris.

The insider added to America's Star magazine: "Kanye gets such a thrill out of dressing her up, he's started calling her his mini muse. He's even talking about designing a clothing line for her."