'To her, he is the sexiest man on the planet': Simon Cowell's seven-year fling with Hollywood beauty Danielle Delaney
13:26 GMT, 9 September 2012
Secrets: Simon is said to have enjoyed a secret seven-year romance with actress Danielle Delaney
He's dated a string of beauties in the past, including the likes of Mezghan Hussainy, Jasmine Lennard and Sinitta.
But a seven-year fling with a relatively unknown actress has now been documented in an updated version of the best selling unauthorised biography.
According to extracts from Tom Bower's The Intimate Life of Simon Cowell published in the Sunday Mirror newspaper, the X Factor mogul enjoyed a string of dates with actress Danielle Delaney.
A friend said: 'She was desperate for the relationship to become more serious, and still is. To her, Simon is the sexiest man on the planet.'
The pair are believed to have first met at a Los Angeles movie screening back in 2002.
But as the 52-year-old star was dating TV presenter Terri Seymour at the time, nothing but a spot of harmless flirting happened.
According to the Sunday Mirror, it was only once Simon split from Terri in 2008 that their friendship turned to romance, with the music mogul making his first move at a Midsummer Night's Dream-themed party hosted by Playboy boss, Hugh Hefner.
After sharing a kiss in front of the whole party, Danielle reportedly stayed at the star's Beverly Hills home until 4am.
A source said: 'She had an amazing night with Simon. She described him as an amazing kisser and said he really knew how to treat a lady. They had a good chemistry together and what they enjoyed was just good clean fun.
Former flames: The music mogul has previously dated TV presenter Terri Seymour (L) and Celebrity Big Brother star Jasmine Lennard (R)
'She was saying how he made her feel like a princess.'
The brunette beauty is now said to have a 'monster crush' on the X Factor chief, but the pair have only seen each other 'a handful' of times since their evening together.
The updated version of Simon's unauthorised biography looks set to be just as explosive as the
It has also been revealed that under the strain of his personal life and his long working hours Simon collapsed earlier this summer.
The X Factor supremo had to halt filming of his US version of the show as he began acting like a 'weird vampire'.
Leading lady: Simon and his former squeeze and close pal, 80s pop icon Sinitta
The 52-year-old was bedridden for a week as doctors told him to cut out all of his health supplements and quit smoking.
As he lay low removed from all of his close friends and work colleagues, Cowell confided in his old friend Louis Walsh.
According to The Sun newspaper, Cowell told Louis: 'I desperately need peace. I'm craving normality. I've got to work out my demons and come out of it.'
The troublesome time in Simon's life has been revealed and documented in an updated version of the best selling unauthorised biography.
Simon's health warning came after he had an operation in LA to fix an earlier facial operation that had been done in London.
Fiancee: SImon was formerly engaged to make-up artist, Mezhgan Hussainy
His personal doctor told him to get plenty of rest after diagnosing him with nervous exhaustion which caused Cowell to miss vital promotional time with new X Factor judge Britney Spears.
It is thought that Simon became tired after trying to juggle his entertainment empire in the UK and the US.
The Sun reported he said: 'My life was like a night shift. I'd forgotten the sensation of the morning.'
In the updated version of Sweet Revenge: The Intimate Life of Simon Cowell, it says that the music boss had become paralysed with tiredness.
His company Syco Productions officially stated that he had come down with bronchitis but Louis was certain his friend had actually suffered a midlife crisis.
With his immune system failing him, Cowell went into hiding and missed work commitments as his US X Factor auditions kicked off without him.
After three weeks in near total isolation he emerged with a new lease of life and decided to clear his life of clutter.
Cowell's long list of female conquests is seemingly still growing as it was revealed recently he enjoyed a seven-year fling with an actress he met at a playboy party.
A representative for Cowell declined to comment to MailOnline.
Stressed: It has also been revealed that under the strain of his personal life and his long working hours Simon collapsed earlier this summer