The Hunger Games actress will begin making appearances for the Dior brand in March 2013, WWD reports.
"It's such a dream to represent an iconic brand that is synonymous with high fashion," Lawrence said.
The actress also spoke about her own style, saying: "It's impossible to be in the industry without getting even the slightest introduction to fashion. I hate being overdressed so I normally find a way to 'casualise' anything too showy.
"If I have a red-carpet event, I definitely want a couple of hours to get ready. But for my everyday life, I'm normally ready in 15 minutes."
Lawrence recently revealed that she likes visiting London as there is less pressure on celebrities.
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