Kristen Wiig has signed on to make her directorial debut with a new untitled comedy project at TriStar Pictures. The actress/filmmaker will reunited with her Bridesmaids co-writer Annie Mumolo, who will co-write the script with Kristen Wiig and produce.

Details on the story are largely being kept under wraps, but Kristen Wiig and Annie Mumolo will reportedly both star as two best friends who find themselves in over their heads and out of their depths.

Here's what Kristen Wiig and Annie Mumolo had to say in a joint statement about their writing process.

"We're very excited to be writing. We will be going into a cave for months to finish. An actual cave. We found one that's nice and big. We're putting a couch in there."

Producer Tom Rothman, who is shepherding the project through his TriStar Productions company, had this to say in his statement.

"Kristen and Annie assured me that the film will be a searing and depressing drama, which is what the world needs right now. So we grabbed it. Perhaps more to the point, these two supremely talented ladies are always ahead of the comedy curve, and as we at TriStar push for originality, we are lucky as hell to be in business with them. The chance to hopefully make Kristen's first film as a director is the cherry on top."

Kristen Wiig and Annie Mumolo both received an Academy Award nomination for their Bridesmaids screenplay.

Annie Mumolo wrote the script for director David O. Russell's upcoming biopic Joy, which stars Jennifer Lawrence as Joy Mangano, the Long Island housewife who made millions by inventing the Miracle Mop. She has also starred in This Is 40, Afternoon Delight and had a recurring role on the NBC sitcom About a Boy. Kristen Wiig most recently starred in The Secret Life of Walter Mitty and Hateship Loveship. She will next lend her voice to the animated comedy How to Train Your Dragon 2.