Pretty Woman Julia Roberts is one of the most recognizable women in the world – not that her three kids would know.

The Mirror, Mirror actress – who is mom to 7-year-old twins Hazel and Finn and 4-year-old Henry – graces the April cover of Vanity Fair and says her children with husband Danny Moder have no concept of fame.

“I was on a a crowded street, and somebody noticed me, and then another person noticed. Somebody said as we were walking past, ‘Oh, that’s Julia Roberts.’ We all just kind of kept going, and then Finn said, ‘Yeah, my mom’s Julia Robinson,’” the famous actress recalls. “That’s what gives you perspective. It could be Robinson, it could be Johnson, because it has nothing to do with me as a person.”

Curious about the experiences of children born into famous families, Julia talked to her Larry Crowne costar Grace Gummer, whom is the daughter of three-time Academy Award-winner Meryl Streep.

“Grace comes up and goes, ‘Gosh, it’s so sweet seeing all your kids on the set. It reminds me of when I was little, and I would go see my mom at work.’ I asked, ‘Were you happy?’ Suddenly, I thought, here is a source of information.”

Julia was relieved to hear Grace came out of being raised in Hollywood with “no trauma.”

“I said, ‘How old were you when you realized your mom was Meryl Streep?’ She said, ‘I think I was probably nine when I put that all together.’ I said, ‘Were you cool with it?’ She said, ‘Yeah, it was fine. There was no trauma.’ So that was hopeful.”

Julia, 44, also talks about the pressures on up-and-coming stars in Tinseltown.

“The business is so different; you can never be that new girl that has that moment of, ‘Where’d she come from?’” Julia says. “There’s the express elevator and there’s rehab. It’s so awful; nobody gets a fair trial-and-error period that everybody deserves and everybody needs.”

Photos: Vanity Fair