Teri Polo (Meet The Parents) and Sherri Saum (In Treatment) will topline ABC Family‘s drama pilot The Fosters, executive produced by Jennifer Lopez. The project tells the story of Stef (Polo) and Lena (Saum) Foster, a mixed-race couple who are raising a biological son, along with several adopted children. When Lena decides to take in Callie, a troubled teen with an abusive past, Callie’s disruptive ways threaten to turn the Fosters’ lives upside down. Bradley Bredeweg and Peter Paige wrote the pilot, from Lopez’s Nuyorican Prods. In addition to Lopez, executive producers include Simon Fields, Bredeweg, Paige, and Greg Gugliotta. Polo, repped by Gersh and manager Bob McGowan, is filming indie A Bit Of Bad Luck.