Prince Andrew's ex girlfriend once headbutted Prince Charles while greeting him.

Koo Stark

Koo Stark

Koo Stark - who started dating the 54-year-old royal in 1981 - has revealed she was attempting to curtsey to the heir to the throne while visiting Andrew at Scottish residence Balmoral but didn't bank on Charles leaning in to give her a kiss.

Breaking her 32-year-old silence on her relationship with Andrew in a piece written in the Mail on Sunday newspaper, the 58-year-old artist explained: "I walked downstairs and into a drawing room full of courtiers who started bowing and curtseying in my direction.

"I guessed it wasn't for me and that it could only mean there was a senior Royal right behind me. I turned and saw Prince Charles, whom I hadn't yet met.

"I curtseyed, only to find him bending down to give me a kiss. I started to get back up - and in doing so headbutted him. He held his head in his hands groaning while I wilted with embarrassment.

"He came towards me again and this time I got it right. He whispered kindly in my ear: 'It's kiss, then curtsey.' "

Koo also visited Andrew - who went on to marry Sarah Ferguson in 1986 - at Buckingham Palace while they were dating but revealed she thought he was taking her on a date to petrol station BP when he first asked her if she would like to dine at the royal residence.

Speaking about their first date in 1981, she wrote: "He collected me from my home, drove us to the restaurant, managed to have plenty of fun without consuming any alcohol, drove me back and secreted a note which I found the next morning on my rustic Biedermeier dresser. 'Come to BP tomorrow for lunch,' it said.

"Initially I wondered why he was taking me to a petrol station - it took me a moment to realise he meant Buckingham Palace. I went.

"We had lunch on trays in the nursery which was the suite of rooms where he and Prince Edward had grown up, but was by then his flat in the Palace.

"The meal was brought into the rooms which overlooked Green Park and Constitution Hill by an immaculately presented footman in tails yet Andrew himself was easy and informal."

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