Natalie Ann Cassidy is commonly known for appearing on EastEnders.
As a child, Cassidy attended Anna Scher Theatre. She joined the cast of EastEnders in 1993, playing Sonia Jackson. In 2006, she played a rival to Lauren Cooper in an episode of The Catherine Tate Show screened on BBC Two. On 9 April 2006, the BBC announced Cassidy's departure from EastEnders with her final scenes being screened in February 2007. She then concentrated on work in theatre, appearing in extensive UK tours of The Vagina Monologues, Bedroom Farce and Gertrude's Secret opposite Prunella Scales and a run of The Cherry Orchard at the Chichester Festival Theatre opposite Diana Rigg.