Ellen Burstyn by Rosemary Goldhar/WireImage.com Ellen Burstyn by Rosemary Goldhar/WireImage.com

A possible side effect of Tim Robbins' new series? It's got Ellen Burstyn on its roster.

According to Variety, the Oscar-winning actress has joined the upcoming Showtime drama, Possible Side Effects, that explores the inner workings of a family-owned pharmaceutical company.

Burstyn will play the matriarch of the Hunt clan, which presumably includes already-announced stars Josh Lucas and Tim Blake Nelson.

Robbins is writing, directing and executive producing the project, along with Elaine Goldsmith-Thomas and Daniel Thomas.

Now how about we get Susan Sarandon on board too? - Joyce Eng