James Middleton and Donna Air Are Closer Than Ever On London Date

James Middleton and Donna Air put on an unusual PDA as they attended a Johnny Walker Whisky party at Mr Fogg's

James Middleton and girlfriend Donna Air looked closer than ever as they hit a star-studded party in London last night.

The pair were spied cosying up at the Johnnie Walker Blue Label bash, held at exclusive Mayfair nightspot, Mr Fogg's.

READ: PIPPA MIDDLEOTN 'VERY CLOSE' TO BROTHER'S GIRLFRIEND DONNA AIR

James Middleton and Donna Air were joined at the party by songstress Rita Ora, who yesterday confirmed her first fashion collaboration, and models Jourdan Dunn and Olivia Inge.

But all eyes were on the star couple, who barely left each others sides all night.

Donna, who wore a slinky black dress for the occasion, was spotted laughing and joking with her beau, who even patted the TV personality on the bottom as they made their way across the room.

They also posed for photos during the evening, and seemed happy to mingle with guests.

James and Donna are fast becoming one of London's hottest new couples, after a string of appearances at exclusive launches and events.

And it seems Donna's been busy settling into the Middleton family, too, with insiders saying she's become 'very close' to James's sister Pippa Middleton.

A close pal told The Sunday People: 'They have cosy suppers and chat about organic cooking and their mutual love of good food.'

A separate source added that it is early days for the pair yet, and only time will tell if they remain friends for good.

‘There’s no denying the girls are from different castes,’ another source told the Daily Mail.

‘But they’re also very different women. Only time will tell if that’s a good thing.’

It's thought Donna is yet to meet Kate Middleton, but insiders believe it is 'only a matter of time'.

WATCH: Pippa Middleton's debut interview...

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READ: PIPPA MIDDLETON 'VERY CLOSE' TO BROTHER'S GIRLFRIEND DONNA AIR

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