Joe Otterson TV ReporterMckenna Grace has joined the upcoming Peacock limited series “A Friend of the Family.”Grace joins previously announced cast members stars Anna Paquin, Jake Lacy, Colin Hanks, and Lio Tipton. The series is based on the true story of the Broberg family, whose daughter Jan was kidnapped multiple times over a period of years by a charismatic, obsessed family “friend.”Grace will star as Jan Broberg in the later years. Jan is the oldest daughter of Bob (Hanks) and Mary Ann Broberg (Paquin) and leads a happy, traditional life in an idyllic American city.