"Fashion Police" co-host Joan Rivers doesn't find Jennifer Lawrence as endearing as the rest of the world does; the 80-year-old fashionista wants the actress to "grow up."

In an interview with the New York Post, Rivers explained she disapproves of Lawrence's view on calling people "fat". The "feud" began when the 23-year-old "Hunger Games" star recently told Barbara Walters she doesn't like the word and believes it should be banned from the media's use.

"Why is humiliating people funny?" Lawrence asked Walters. "I get it. I do it too. We all do it. But I think when it comes to the media, the media needs to take responsibility for the effect that it has on the younger generation, for these girls who are watching these television shows. [They're] picking up how to be cool and how to talk, so then all of a sudden being funny is making fun of the girl who's wearing an ugly dress."

"And the word 'fat'?" she added. "I just think it should be illegal to call somebody fat on TV. We're regulating cigarettes and sex and cuss words because of the effect it has on our younger generation. Why aren't we regulating things like calling people 'fat'?"

Rivers didn't take her comments too kindly, as she is known for her blunt honesty on the E! show "The Fashion Police".

"My New Year's resolution is [ensuring] Jennifer Lawrence grows up and realizes how lucky she is and calms down," Rivers told the Post.

"I love that she's telling everyone how wrong it is to worry about retouching and body image, and meanwhile, she has been touched up more than a choir boy at the Vatican," Rivers added. "Look at her posters. She doesn't have a nose, she has two holes. She just has to learn, don't talk if you're doing it."

However, Lawrence has been open about not losing weight for any role she takes on in Hollywood.

"We have the ability to control this image that young girls are going to be seeing," the actress told The Guardian. "They see enough of this body that they will never be able to obtain and it's an amazing opportunity to rid ourselves of that in this industry.