Ginnifer Goodwin stars as Margene Heffman on HBO's Big Love. Margene is Bill's third and youngest wife and has had three children with him: Aaron, Lester and Nell.
Bill met Marge when she worked at Henrickson Home Plus and he eventually had her serve as a babysitter for his children.
In season two, Margene's mother came to visit and passes away in season three.
In season two, it's also revealed that Margene has a relationship with one of Bill's employees before marrying Bill. While Bill seems to be okay with it, his eldest son, Ben, who has a thing for Margene, is very much not. Bill ends up transferring him.
In season three, Margene decides to start her own jewelry business as she's getting sick of just being a housewife.