The former Strictly Come Dancing contestant, who met Harry at a state dinner in Jamaica recently, said that she prefers his company to his brother Prince William because he is less "safe".
Dell'Olio told The Telegraph: "Yes, I will be seeing Harry again soon, but I can't tell you where, as I won't be making those plans public. They [Princes William and Harry] are both all right, but they have different looks.
"I'd say Harry is more naughty than William, which is what I prefer. William is, perhaps, too safe. I think a lot of Harry. He can carry himself, he is very mischievous, but also has a bit of rough about him. I would describe his looks as 'rugged'. He has a great sense of humour and always makes me laugh."
Dell'Olio, who put her relationship with theatre director Sir Trevor Nunn "on hold" last year, said that she does not "have a secret" to attracting men, but added: "I'm very happy at the stage of life that I am - physically and mentally - in right now. I feel that I am in my prime. I look better than I did ten years ago."
She also revealed that she is writing a book. When asked if Prince Harry could feature in it, she said: "Perhaps."
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