‘Mom’ Season 4: Meet the Cast

Allison Janney as Bonnie

Bonnie was a bit of wild child, and began drinking at just 15-years-old. In Season 1, she thinks she's pregnant, but finds out she's going through menopause, which makes her very angry. Bonnie grew up in the foster care system, and had Christy after running away with Alvin-- she nearly put her daughter up for adoption but backed out last minute. (Getty)