Fox 2000 has hired “Erin Brockovich” screenwriter Susannah Grant to write the screenplay for its Helen Gurley Brown biopic.

The project, set up at the studio in late 2014, follows the career of Gurley Brown at Cosmopolitan as one of the first female editors of a national magazine. The studio optioned “Enter Helen: The Rise And Reign Of The Original Cosmo Girl” by Brooke Hauser at that point and set up the project at Peter Chernin’s Fox-based Chernin Entertainment.

Marisa Paiva is overseeing for the studio.

Gurley Brown wrote the 1962 bestseller “Sex and the Single Girl,” which inspired a 1964 movie of the same name starring Natalie Wood. She became editor at Cosmopolitan in 1965 and revamped the magazine as a key voice during the sexual revolution and the emergence of the women’s liberation movement.

Brown was in charge of the magazine for 32 years, transforming it into one of the most successful publications of the era. She was married to “Jaws” producer David Brown, who wrote many of the colorful cover headlines for the magazine, and passed away in 2012 at age 90.

Grant received an Academy Award nomination for the “Erin Brockovich” screenplay. She also wrote the screenplays for “Ever After,” “28 Days,” “Pocahontas,” “In Her Shoes” and “The 5th Wave” as well directing Jennifer Garner’s “Catch and Release” from her own screenplay.

Grant also created and produced the CBS series “A Gifted Man” and received the Writers Guild of America West’s Valentine Davies Award in 2011.

She’s repped by CAA. Her attorney is Christine Cuddy of Kleinberg, Lange, Cuddy.