The former Doctor Who star, who changed her mind after the compliment, was once planning to go for breast implants because she was too conscious about her small size bust.
"I've always had a problem with my breasts because I think they're incredibly small and ridiculous. But not long ago someone said to me, 'Darling, they're French,' Contactmusic quoted Piper, as saying.
"It changed my life and made me accept what I've got. Now it's like, 'Yeah they're small but they still look sexy even without a bra,'" she added.