Monagallaku Monagadu is a 1966 Indian Telugu-language action thriller film directed by S. D. Lal and produced by Rama Sundaram. It is a remake of the Hindi film Ustadon Ke Ustad (1963) and its Tamil version Vallavanukku Vallavan (1965). The film stars S. V. Ranga Rao, Haranath, Prabhakara Reddy, Raavi Kondala Rao, Krishna Kumari and G. Rathna. It was released on 14 January 1966, and became a commercial success.
Ramesh, an engineer, impresses Madhava Rao, a businessman, with his plan to build a factory. Madhava Rao's daughter Geetha falls in love with Ramesh. Partners in crime Bhujangam and Mala loot a bank. With some of the looted money, Mala travels in a bus in which Ramesh also happens to be seated. Their suitcases get interchanged, and Ramesh, now suspected of committing the bank robbery, is arrested. To avoid his own arrest, the actual culprit, Bhujangam hires Kathula Rathaiah, an assassin, to kill Ramesh. Geetha had earlier saved Rathaiah, who has since considered her his sister. After learning of her love for Ramesh, he promises to help Ramesh to clear his name. After a few disguises by both Ramesh and Rathaiah and many more incidents, Bhujangam and Mala are brought to justice.