Kathleen Walsh was an English actress, dancer, and screenwriter. Her film career prospered after she met her future husband film director David Lean, with whom she worked on prestige productions such as In Which We Serve and Oliver Twist.

Oliver Twist is a 1948 British film and the second of David Lean's two film adaptations of Charles Dickens novels. Following his 1946 version of Great Expectations, Lean re-assembled much of the same team for his adaptation of Dickens' 1838 novel, including producers Ronald Neame and Anthony Havelock-Allan, cinematographer Guy Green, designer John Bryan and editor Jack Harris. Lean's then-wife, Kay Walsh, who had collaborated on the screenplay for Great Expectations, played the role of Nancy. John Howard Davies was cast as Oliver, while Alec Guinness portrayed Fagin and Robert Newton played Bill Sykes.