Petralthan Pillaiya is a 1966 Indian Tamil-language drama film directed by Krishnan–Panju and written by Aaroor Dass.
The film stars M. G. Ramachandran, B. Saroja Devi, and Sowcar Janaki, and is based on the 1921 American film The Kid.
The movie revolves around a tramp named Anandhan who finds a homeless boy and raises him as his own son until five years later when the boy's biological parents try to find him.
Released on December 9, 1966, Petralthan Pillaiya emerged as a commercial success, running for over 100 days in theatres.
The film was remade in Malayalam as Ashtamirohini (1975).