The Manson Girls family continues to grow as the Junction Films’ production preps to roll camera in Los Angeles come March. Monica Keena (Night of the Demons), Estella Warren (Planet of the Apes), Stella Maeve (“My Super Psycho Sweet 16: Part 2”), and the very milfy Laura Harring (One Missed Call) are the latest to be cast opposite Thora Birch (Deadline) in director Susanna Lo’s bio-pic on Charles Manson cult follower Nancy Pitman.

Warren and Maeve don’t have a lot of horror creds under their garter belts, but Keena has headlined Freddy vs. Jason and director Adam Gierasch’s Night of the Demons remake, in which she experienced her first ever on-camera lesbian smooch (read about that here, ya perv). Harring, of course, is no stranger to girl-on-girl action either. The now 46-year-old stunner bedded Naomi Watts in David Lynch’s trippy 2001 psychological thriller Mulholland Drive.

Laura Harring & Naomi Watts in Mulholland Drive

Manson Girls costars the terrific Heather Matarazzo (Hostel II), Patti D’Arbanville (Perfect Stranger), and Michael Monks (Street Kings). Tinsel town terror Lindsay Lohan was originally attached to portray Nancy Pitman in the film, but was replaced by Birch back in October.

(Update: Meet the latest Manson Girls here)

Erin Kelly, and Nikki Blonsky (”Huge”) are also no longer involved with the project.