Kirsten Dunst has been named as the first-ever face of L'Oreal Professionnel, the haircare side of the company.
The On The Road actress will be the brand's celebrity spokeswoman, according to Digital Spy.
She said in a statement: "I feel very close to L'Oreal Professionnel.
"The brand is strongly connected to fashion and I admire its commitment to innovation, constantly creating new professional services and products to achieve the most on-trend styles."
International managing director of L'Oreal Professionnel Anne-Laure Lecerf said she was pleased to have secured Kirsten as an ambassador.
She said: "Kirsten Dunst has a timeless beauty and is a modern woman, closely connected to fashion. She has a strong personality and makes her own choices.
"Her great professionalism and commitment to excellence make Kirsten one of the most talented actresses I have ever met.
"She has the perfect attributes to embody the new values of L'Oreal Professionnel."
Although Kirsten is the first celebrity to be the face of L'Oreal's haircare arm, many other famous faces have represented their cosmetics including Lea Michele, Jennifer Lopez, Julianne Moore and Cheryl Cole.