'Meghan is really fake and a piece of work as I know you've said before?' host Deborah Knight quizzed Piers.
He replied: ‘You know what I'm sorry to have to say I'm afraid I think she is.'
‘Although some people really like her and are falling for this act I'm afraid I see a bit of hard-nosed actress.'
‘She's been using people on her way up to what is now, of course, the top, which is marrying into the royal family.’
The 53-year-old recalls a time he has drinks with the Duchess of Sussex.
Piers revealed: ‘I had a couple of pints of real ale and she had dirty martinis.'
‘She said afterwards in the cab 'I had a great time. Love to see you again.'
‘She went in that cab that night to a party Prince Harry was at and the next night she went on the date with him. I never heard from her again. Ever.'
‘I don't like people that behave like that. It's kind of rude. It showed me that she, I'm afraid, is probably a bit of social climber.’
Piers said that over two year period he "got to know her quite well", saying they "would message each other a lot, e-mail a lot."
‘Good luck to Harry. I hope he knows what he's doing.'
‘If it all goes wrong don't come try crying to me. Don't say I didn't warn you.’
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