Victoria Beckham left "quivering" when she met Julia Roberts

She hangs out with A-listers like Will Smith and Tom Cruise -- but Victoria Beckham admits she was left a "quivering wreck" when she met Julia Roberts.

"What do you do when you meet someone like Julia Roberts? She's a legend," Victoria -- who met the 'Pretty Woman' actress at Giorgio Armani's party in New York last week -- gushed. "There was a red carpet line-up and as I came to greet her, I found myself bending to curtsy.

"I was like, f*** that's Julia Roberts!

"Incredibly, she knew who David and I were and we got on really well. She's very down-to earth. We're both mums with young children, so we had a lot to talk about. We've swapped numbers and I'm looking forward to catching up with her again.

"Most of my friends in LA, like Katie Holmes and Kate Beckinsale, all have children so we get together and do very normal things."

But Victoria insists that she doesn't just spend her time with superstars. "It's not just celebrities I hang out with though," she says. "I've become really good friends with the moms from my sons' school as well."

The former Spice Girl, 34, also revealed that, despite being offered several major film roles - including a cameo in Sex And The City, she doesn't rate her acting skills. "I'm a terrible actress. Everyone thinks I'm only friends with Tom and Katie to be in a movie but it's not true. I've turned down lots of roles," said Victoria -- who recently made a cameo in the hit show Ugly Betty.

"I love Sex And The City and I'm going to arrange a girlie night to watch the film. But I'm happy doing what I'm doing right now.

"I've never had so many career opportunities in my life. I've finally found something I'm really good at and I love it."