Ammayane Sathyam (അമ്മയാണെ സത്യം, English: I Swear on my Mother) is a 1993 Malayalam film written and directed by Balachandra Menon. The film stars Mukesh, Annie, Balachandra Menon, Narendra Prasad, Jagathy Sreekumar, Ganesh Kumar, Thilakan, K. P. A. C. Lalitha, Paravoor Bharathan, Prem Kumar, and Mammukoya. Balachendra Menon remade the film in Tamil as Kandaen Seethayae, however the project was later shelved. He also introduced actress Annie through this film.

Fifteen-year-old Parvathi witnesses her family getting murdered by Jaganatha Varma. She runs away from them to save her life. To prevent getting caught, she disguises herself as a boy named Thomas and starts living as a servant in a house of bachelors. One of the bachelors, Omanakuttan discovers that Thomas is actually a girl.^[1][2] After hearing her story, Omanakkuttan and his friends try to help her. Before Jaganatha Varma could kill her, Policeman S. Narayanan discovers his plan and saves Parvathi.