The famed novelist, who is described as "part JD Salinger with a touch William Faulkner and a sprinkle of Gore Vidal," will give Molly a writing lesson that neither she nor her family are soon to forget.
Sarandon weighed in on the news via Twitter, writing:
So excited to be working with Melissa McCarthy again, this time on 'Mike and Molly.' But why am I always playing an alcoholic?
The 66-year-old actress stars alongside McCarthy in the upcoming film "Tammy," which is set to be released on July 4, 2014. The "Bridesmaids" star co-wrote the comedy with her husband Ben Falcone, who is also the director. It co-stars Dan Aykroyd, Allison Janney, Kathy Bates, Toni Collette, and Mark Duplass.
Sarandon's recent TV credits include "The Big C," "30 Rock" and "Saturday Night Live."
"Mike & Molly" is scheduled to return for Season 4 in November.