In an interview with Elle magazine, the "Hunger Games" actress conceded she does not fit the Hollywood standard of beauty.
"In Hollywood, I'm obese," the 22-year-old said. "I'm considered a fat actress."
She said she doesn't crash diet for roles and doesn't want to send that message to her young fans, CNN reported Friday.
"I eat like a caveman. I'll be the only actress who doesn't have anorexia rumors," Lawrence said.
"I don't want little girls to be like, 'Oh, I want to look like [her 'Hunger Games' character] Katniss, so I'm going to skip dinner," she said. "That's something I was really conscious of during training [for the movie], when you're trying to get your body to look exactly right. I was trying to get my body to look fit and strong -- not thin and underfed."
Lawrence said her boyfriend, "X-Men" co-star Nicholas Hoult, admires her body as it is.
"He's my favorite person to be around and makes me laugh harder than anybody," she said.