The ‘X Factor’ host is penning an autobiography as part of a reported £100,000 two-book deal with publisher Simon & Schuster.
The Mirror reports that a press release was issued by publishers, stating: “Caroline will lift the lid on her personal life and relationships, including dating two of the world’s most eligible bachelors, Harry Styles and Prince Harry.”
Caroline has previously remained coy about her romance with 1D’s Harry, which became a national talking point in 2011 owing to their 14-year age gap, and the fact that the singer was just 17 at the time.
Speaking about the controversy earlier this year, she told The Telegraph: "I'm not going to ever apologise for it because there was nothing at the time that was serious or bad and nobody was getting hurt."
After Caroline and Harry split in January 2012, she went on to date music manager Jack Street, before they split during her stint on last year’s ‘Strictly Come Dancing’.
However, the pair were recently reported to have reunited, after they were spotted cosying up at Glastonbury last month.