The Royal and actress enjoyed a whirlwind romance in the 1980s and were tipped to marry but split after 18 months when it was revealed she had appeared in an erotic film.
The 59-year-old has always remained tight-lipped about her relationship with the Queen’s son, but ‘CBB’ bosses will be hoping Koo will spill the beans on their affair whilst in the house.
A show source told The Sun: “We think Koo is a brilliant booking. There aren’t many people who dated a royal.
“She has traditionally been very discreet, but if she decides to open up, she will have some amazing stories to tell.”
Yesterday it was reported that ‘Strictly Come Dancing’ star Kristina Rihanoff had also signed up for the new series of ‘Celebrity Big Brother’ when it returns to Channel 5 in January.
A source told the Sun: “[Kristina] hasn’t told bosses at Strictly she’s going, but there is next to no chance that they will have her back when they hear she’s signed up for CBB.”
But Kristina was quick to play down the rumours and took to Twitter to joke that she was also going to join the ‘X Factor’ tour.
“According to @TheSun I was banned from @bbcstrictly, quit the show & doing Big Brother! The truth is I'm the wild card on @Xfactor tour," she tweeted.