Peggy was introduced as a guest character in April 1991, by executive producer Michael Ferguson. The character was brought in as the mother of the already established Mitchell clan: Phil (Steve McFadden), Grant (Ross Kemp) and Sam (Danniella Westbrook). Specifically, she played a key role in a storyline about the elopement of her daughter Sam with Ricky Butcher (Sid Owen). Peggy was played by actress Jo Warne for a period of three months, but was written out upon the completion of the storyline. Two other actresses had been cast in the part before Warne. The first quit before she could film any scenes, and the second filmed eight episodes, though all of her scenes were scrapped before broadcast.