To debut Nov. 5, the half-hour, Boston-set comedy will star writer, director and executive producer Frankie Shaw.
Rosie O'Donnell was previously announced to play the lead character Bridgette's mother Tutu.
The show is based on Shaw's short film.
A synopsis said it "will take a raw and honest comedic look at a single, 20-something from Southie, Bridgette, whose desires for relationships, sex and a career collide with the realities of young, single motherhood."
"Britton will play Ally, Bridgette's unstable boss who struggles with boundaries and finds herself in constant pursuit of self-betterment," the cable network said in a press release. "Her expectations for Bridgette's role in her life go far beyond tutoring her kids."
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