Pippa Middleton has reportedly moved in with her boyfriend.

Pippa Middleton

Pippa Middleton

The sister of Britain's Duchess of Cambridge rekindled her romance with hotel heir James Matthews two months ago following the end of her three-year relationship with hedge fund manager Nico Jackson and things are believed to be so serious that they are now living together.

An insider told the Sun on Sunday: "It's all moved very quickly. They've been friends for a long time, but James has always been keen.

'They've tested living there and all seems to have gone well. As she was spending so much time at James's it made sense to keep stuff there."

James, 40, whose brother is 'Made in Chelsea' star Spencer Matthews, owns a £17 million townhouse in Chelsea, West London.

A source previously told MailOnline: "James is behaving like a peacock, he is showing her his feathers and wants her to be impressed. James is really into Pippa and she is falling into step. There is affection between them."

Meanwhile, Pippa and James were most recently spotted enjoying a holiday with Pippa's brother James and his girlfriend Donna Air in St Barts over the festive period.

Despite his family's hotel - the luxurious Eden Hotel - being nearby, Matthews opted to stay with Pippa and James Middleton at a villa overlooking the island's capital of Gustavia.

The couple were seen topping up their tans as they enjoyed a number of activities including tennis whilst also sampling various dishes as they dined out and about on the beautiful island.

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