The Beatles legend insists Stella - who is a renowned fashion designer - was destined for greatness because she had him and his late wife Linda as parents.
He said: "Well, the genes are there. She's a very clever girl."
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Designer Stella McCartney (R) arrives with U.S. actress Kate Hudson for the 30 Days of Fashion and Beauty Gala party in London September 16, 2008. |
Paul made the comments after Stella was honoured at the Natural Resources Defense Council's (NRDC) annual Forces For Nature benefit in New York for her environmental work.
The 37-year-old designer is a staunch vegetarian - like her mother, who promoted her meat-free lifestyle with her own range of vegetarian foods - who refuses to use fur or leather for her label.
Paul added: "She's very brave, and she has solid principles that she's stuck with against all odds, so I respect her for that. I'm a very proud dad."
Speaking before the ceremony, NRDC chairman president Frances Beinecke said: "Stella demonstrates that you can be a protector of the environment and a leader of industry at the same time."
The event had a green theme, with actor Alec Baldwin arriving in an environmentally-friendly hybrid Sports Utility Vehicle.