Kate's little sister is best known for her bottom but she's never bared it!

Pippa Middleton found instant global fame as Kate‘s Maid of Honour at the Royal Wedding in April.

But it seems it was mostly guys with an eye for a fine bottom who became big fans.

In a US survey for Vanity Fair magazine and current affairs programme 60 Minutes, just 32% of people knew who
Pippa was, and a few even guessed that she’s an adult film star.

‘It’s hard to believe that with all the attention she gets she is still relatively unknown in the States,’ a royal source tells the Daily Star’s Ed Riley.

Others thought Pippa Middleton could be a news correspondent or even a children’s book heroine.

But those that don’t know who she is will soon have more of an idea as US channel TLC is airing an hour-long show on the 27-year-old.

‘She has an X Factor charisma, even a star quality,’ says one expert on the Crazy About Pippa show trailer.

‘There was almost a gasp across the world, who’s that girl?

‘Suddenly it was all about Pippa Middleton…she single-handedly crash Twitter.’

Crazy About Pippa airs on US channel TLC on 9 August at 9pm.

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Esme Riley