Gina Gershon is going on a safari in the "Lipstick Jungle."

The sultry brunette has been cast as Wendy Healy, the powerful chief of a movie studio in NBC's pilot based on the best- selling book from "Sex and the City" author Candace Bushnell.

"She's an actress whose work I've ad mired for a long time," Bushnell told The Post yesterday. "She lives in New York, and I'm thrilled that she's our first on board."

In Bushnell's novel, Wendy learns that a competitor is trying to oust her and "must decide between her career and her marriage," according to Bushnell's Web site.

"She is the breadwinner in her family," Bushnell said. "And her husband doesn't work, so she really embodies this new paradigm of the new American woman, especially the New York career woman."

The book and the new TV show, both of which are considered something of a follow-up to "Sex and the City," follow the trials and tribulations of three best friends, who also happen to be among the most powerful and successful women in Manhattan.

Unlike "Sex and the City," in which most of the main characters were in their early- to mid-30s, the stars of "Lipstick Jungle" are in their 40s and much further along in their careers.

NBC is still casting the two remaining main characters, top-tier fashion designer Victory Ford and Nico O'Neilly, the glamorous, brilliant magazine editor.

NBC — which is in dire need of a new hit show — is considering "Lipstick Jungle" for its fall schedule.