The 30-year-old actress will launch the brand's new Naturals line, which jibes with the star's long-held vegetarian and green lifestyle.
"I am thrilled to be the new face of Neutrogena Naturals because this naturals line really speaks to me," says Bell.
"As someone who uses a lot of natural product, it is exciting that Neutrogena is introducing a naturals line that not only works, is enjoyable to use, but also doesn't contain any dyes, chemical sulfates, parabens or petrochemicals," adds Bell.
The new line will contain two facial cleansers, a face scrub, a bar soap and a lip balm.
Neutrogena claims its Purifying Facial Cleanser is clinically proven to be more effective than the leading naturals cleanser. (We're guessing a stroll through the Whole Foods beauty aisle may lend some clues to its identity.)
And Bell is keeping good company. Other Neutrogena spokesmodels have included buddy Hayden Panettiere, Jennifer Garner, Diane Lane, Gabrielle Union, Vanessa Hudgens, Miranda Cosgrove, Susie Castillo and Emma Roberts.
The Michigan native is also a serious animal lover, with three dogs of her own: Welsh corgi-chow chow mix named Lola, Welsh corgi-Chihuahua mix named Shakey and a black Labrador retriever named Sadie. Bell rescued Sadie, then 11 years old, after Hurricane Katrina in 2005.
And another fun fact: She rang in the big 3-0 by dedicating her birthday to raising awareness for Charity: Water, which brings clean drinking water by way of building wells in developing countries.
We love it when cover models score double as role models, too.
In other spokesmodel news that has us cheering, Olay just signed 54-year-old actress Kim Cattrall as the new face of its Total Effects Anti-Aging Body Line.
Watch the video below as Kristen Bell's stylist, Nicole Chavez, breaks down her style.