""I've known her since I was 20. I met her in London when I was starting out, and I had no idea who she was... One night we were joking about a guy we knew from Liverpool, and she said, 'That's so on the mark because, you know, my dad is from there.' I said, 'Your dad's from Liverpool?' I had no idea. She's totally unassuming. I was clueless."" Welsh actress Catherine Zeta-Jones was unaware her designer pal Stella Mccartney was the daughter of Beatles legend Paul McCartney.