The 24 year-old has been dating Prince Harry for over a year now, but she's yet to be introduced to his sister-in-law the Duchess of Cambridge according to royal insiders, Nicholl revealed to to EntertainmentWise.
The royal editor at the MailOnline, who has recently published Kate: The Future Queen about Prince William's wife, claimed the reason could well be her previous rivalry with Cressida's sister, Isabella Anstruther-Gough-Calthorpe.
According to Nicholl, Prince William had very strong feelings for Isabella when Kate Middleton was already on the scene in 2004, though the socialite was reluctant to date a royal and so turned him down. When William began dating Kate, she was reportedly so intimidated by his previous feelings, Nicholl's claims, that she banned the prince from seeing her again.
Isabella is now happily married to Sam Branson, a close friend of both Kate and William, but there is said to be "friction" between the two families.
Katie claimed though she believed the two women will act in an "adult" way when they do eventually meet.Aside from some "friction" with the Duchess it looks like a wedding between Harry and Cressida could be on the cards. Insiders have told E! News that the blonde socialite is definitely the one for the 29 year-old prince.
The close source claimed when Harry isn't away with his Army commitments the two are inseparable.
"[They] basically live with each other these days and are rarely out of each other's sights," they revealed. And when it comes to marriage, don't expect to wait too long for another royal wedding, according to the report.
"This is it for them both," a close friend explained. "He hasn't proposed yet, but it's only a matter of time."
And while it's unknown whether these reports are true, Harry didn't exactly deny wedding plans when asked about speculation he is set to tie the knot during his recent trip to Oz.
According to People magazine Harry, who was making his first official trip to Australia, was more than happy to greet well wishers, with one bold enough to ask the question on everyone's lips, whether he's going to make Cressida Bonas the next royal bride.
They said, according to the magazine: "When are you getting married?" to which Harry reportedly just laughed and moved on. So he wasn't exactly denying it was he?
Just months before dating Harry did confess he was looking for that special someone to settle down with. In an interview with Katie Couric on US TV for the Queen's Jubilee celebrations, he said: "I've longed for kids since I was very, very young...so I'm just waiting to find the right person, someone who's willing to take on the job."
Cressida is the first serious girlfriend the prince has had since ending his decade long romance with Chelsy Davy. The Zimbabwean was said to be unwilling to take on the pressures of marrying a royal. Let's hope Cressida doesn't feel the same way.