It was almost as if the invitation had read 'Cowboys and Indians'.

There was a distinct look of Pocahontas about Princess Eugenie yesterday as she partied at one of her favourite nightclubs into the small hours.

Her eye-catching boots, gold plaited headband and colourful accessories gave a distinct flavour of the Wild West. Even the tassels on her bag seemed to add to the effect.

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Eugenie is still celebrating her excellent A level results as she partied until 3am

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Boot-iful: The young royal wore an interesting pair of Indian style embroidered boots with her boho style outfit

The 18-year-old daughter of Prince Andrew and the Duchess of York was at Boujis in South Kensington for her second night out of the week.

She appears to be still celebrating her A-level results last month - she got As in art and English literature, as well as a B in history of art, just pipping her sister Beatrice, who managed an A and two Bs last year.

Eugenie, who studied at Marlborough College, the £23,000-a-year boarding school in Wiltshire, plans to take a gap year before going to university.

She was joined at Boujis by her cousin Prince Harry and his girlfriend Chelsy Davy.

It was a rare sighting of the couple together - 23-year-old Harry was joined by law student Chelsy, 22, in London only last week after he spent two weeks on safari in Botswana.

Harry is waiting to resume duties at the Blues and Royals HQ in Windsor before he and Chelsy are again reunited at Prince Charles's 60th birthday party in November.

But Harry and Chelsy didn't look as if they'd enjoyed themselves, as they emerged from the club looking rather glum-faced.

The glums: A red-faced Prince Harry emerges from club Boujis holding girlfriend Chelsy Davy's hand

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Take my hand: A serious-looking Prince Harry clasps Chelsy 's hand to guide her to their waiting car

The red-faced royal was dressed casually in faded jeans and blazer, while Chelsy showed off her legs in a flirty floral print frock.

He is staying at Clarence House in the apartment he shares there with his brother Prince William while he waits to resume duties at Blues and Royals HQ in Windsor.

Chelsy has clearly got the royal seal of approval, as she received her first invitation to a formal event at Buckingham Palace after she was invited, along with Kate Middleton, to Prince Charles 60th birthday celebrations.

It is expected that a number of dignitaries, including the Prime Minister, will also attend the birthday celebration on November 13th.