Exclusive: Anthony Edwards and J. Smith-Cameron join Elizabeth Olsen and Cristin Milioti in the FX drama pilot Seven Sisters.

The project, from FX Productions, follows a large, tight-knit family that begins to unravel when a sister (Olsen) starts communicating with a voice no one else can hear, forcing them to confront long-buried secrets.

We hear that Edwards will portray family patriarch Paul Bosco and Smith-Cameron will portray his wife, Francesca, in series regular roles should the pilot get picked up to series. They join Milioti, who we revealed yesterday will portray Olsen’s character’s sister.

Seven Sisters is executive produced by Will Arbery, who wrote the pilot; Sean Durkin, who will direct it; and Garrett Basch. If the pilot goes forward, it would mark Basch’s fifth series for FX, where his company Dive has a long-standing first-look deal, following Devs, Reservation Dogs, What We Do in the Shadows...