The True Story of Lynn Stuart (originally titled The Other Life of Lynn Stuart) is a 1958 American biographical crime drama film starring Betsy Palmer, Jack Lord, Barry Atwater and released by Columbia Pictures.

Marking the final directorial effort of Lewis Seiler, it dramatizes the true story of a young Santa Ana, California, housewife who became a volunteer undercover narcotics agent in the 1950s. The woman, known publicly only by the pseudonym Lynn Stuart to protect her from possible reprisals, served in that capacity for six years and provided information which ultimately led to approximately 30 drug-related convictions.