Though Kate Winslet is celebrated for her curvy figure, the 35-year-old actress tells the April issue of Glamour that she wasn't always happy with her body.

"I will tell you that when I was heavy, people would say to me -- and it was such a backhanded compliment -- they would say, 'You've got such a beautiful face,' in the way of, like, 'Oh, isn't it a shame that from the neck down you're questionable,'" she recalls.

Winslet's weight isn't the only part of her appearance under scrutiny; she also denies ever having plastic surgery.

"No, I have never tried any of that stuff," she tells the mag. "I don't have parts of my body that I hate or would like to trade for somebody else's or wish I could surgically adjust into some fantasy version of what they are."

Instead, the Oscar-winning actress -- who split from director Sam Mendes in March 2010 -- says she's focused on raising her two children, Mia, 10, and Joe, 7.

"The challenge is making sure that they're never treated different just because I sometimes am," she says. "I always want them to be regular kids who are grateful and respectful of other human beings."

"I want them to know that when we fly first-class, that they are lucky," Winslet continues. "The highest compliment I could ever receive about my kids -- and I can say that this does happen frequently -- is when the in-flight crew say to me, 'Your children are wonderful. They are so well-behaved.' Every time I am told that, I could weep."

For now, the Mildred Pierce actress says she isn't too concerned about where she'll be in five years.

"I don't want to know," she says. "As long as my kids are OK, I think it is really good for me not to have the answers."