Jennifer Lawrence says a producer put her in a 'nude line-up' and told her to lose '15 pounds in 2 weeks'

Jennifer Lawrence shared a personal story about a "degrading and humiliating" experience she had with a Hollywood producer during her speech at Elle's Women in Hollywood event Monday night.

Lawrence, one of eight honorees at the event, said when she was just at the beginning of her acting career, she was told by a producer on a film she was working on to "lose 15 pounds in two weeks."

Another actress had already been fired from the project for "not losing enough weight fast enough," according to Lawrence.

"During this time, a female producer had me do a nude line-up with about five women who were much, much, thinner than me. We stood side-by-side with only paste-ons covering our privates," Lawrence recounted.

Lawrence said the line-up had been "degrading and humiliating," and that afterwards, the same female producer told her to use the naked photos of herself "as inspiration" to lose weight.

Lawrence, who took issue with the "unrealistic diet regime" she was expected to maintain, went to another producer to discuss it.

"He said he didn't know why everyone thought I was so fat, he thought I was 'perfectly f-able,'" Lawrence said.

The actress described feeling "trapped" and powerless by the entire experience. "I let myself be treated a certain way because I felt I had to for my career," Lawrence said. She said she felt that she was still negotiating how to stick up for herself without being labeled as "difficult" - although according to Lawrence, the producers on that film did call her a "nightmare."

Lawrence said when working on "The Hunger Games" films, she was extremely conscious of the effect that harsh beauty standards can have.

"We will stop normalizing these horrific situations," Lawrence said. "We will change this narrative and make a difference for all of those individuals pursuing their dreams."