American-style bowling and her own baby elephant: Princess Eugenie celebrates 20th Her arrival in the world was proclaimed by a town crier who announced the news across the city of London.

Twenty years on and there were very different celebrations in store for Princess Eugenie as she marked the end of her teenage years this week.

Festivites began early for the pretty British royal, who headed out the day before her birthday for an evening at a ten-pin bowling arcade with her parents, Prince Andrew and Sarah Ferguson, and her older sister Princess Beatrice.

The night, which was also attended by 50 of Eugenie's friends, had a transatlantic theme, and took place in a private room, complete with pinball machines and glow-in-the-dark bowling balls.

"They had great fun," a source told the Daily Mail. "Eugenie, Beatrice and their friends were all in Fifties clothes."

"They drank mojitos and ate mini-burgers, hot-dogs and other American fare – and Andrew turned out to be a dab hand at the bowling."

Her all-American evening wasn't the only bash prepared for Newcastle University student Eugenie.

On Tuesday, the actual day of her 20th birthday, she joined her mum, sister and Beatrice's boyfriend Dave Clark at a party held for the Elephant Parade charity.

There was, however, no sign of her rumoured love interest, Richard Branson's nephew, Otto Brockway.

Dressed all in black, bar the tropical flower adorning her hair, the Queen's granddaughter was presented with a very special present to mark her big day – her own decorated model elephant.

The gift comes as part of a new charity initiative to take place in the summer, which will see 250 unique hand-painted life-size model baby elephants placed around the British capital, including Buckingham Palace and Parliament Square.

Designers and artists such as Lulu Guiness and Diane von Furstenberg are among those who have decorated the mini mammals for the public art event, which is being held to raise awareness about the plight of the Asian elephant.

Following their appearance at the London charity do, the group headed off for a private dinner celebration in honour of the birthday girl.

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