The 41-year-old actress had submitted a request to the MPAA Classification and Rating Appeals Board to change her upcoming film, The Other Woman, from R to PG-13. The film's "mature thematic material, sexual references and language" now garner it a PG-13 rating.
Diaz had expressed frustration with the ratings board last month at CinemaCon in Las Vegas. The actress perceived the film's R rating as a bias against women doing edgy comedy.
"It's really unfortunate that [members of the ratings board] see things that women do a little more strict," the star told reporters. "They judge us a little bit more than they do men."
"A lot of the things that they're judging -- like we say [in the film], 'You need to close your vagina,'" Diaz continued. "Like you can't say 'vagina'... What's wrong with a vagina? Guys make references to their parts all the time nowadays without getting the R rating."
The new movie stars Diaz as Carly, a woman who discovers her boyfriend Mark (Nikolaj Coster-Waldau) is married. Carly meets Mark's wife, Kate (Leslie Mann) by chance, and the two discover that Mark has cheated on them with yet another woman -- Amber (Kate Upton). The women then team up to plot revenge on their three-timing husband and boyfriend.
The Other Woman debuts in theaters on April 25.
2014: The Year in Fashion [PHOTOS]
Tracy Morgan hits back at Walmart