joanne ryan, played by tara lynne o'neill, is hired by peggy mitchell (barbara windsor) as a nanny to care for baby louise mitchell, much to louise's mother lisa fowler's (lucy benjamin) dismay. joanne is attracted to louise's father phil mitchell (steve mcfadden) and is sacked when she tries to seduce him. joanne also has a fling with the newly arrived dennis rickman (nigel harman). after being rejected, joanne gets her revenge on phil by renting his house to albert square's new doctor, jonathan leroy (ivan kaye) and his wife. after this she leaves walford and has not been seen since.