Nalla Thambi is a 1985 Indian Tamil-language film directed by S. P. Muthuraman and produced by AVM Productions.
The movie stars Karthik and Radha, and follows the story of Raja, a young man who returns home after completing his MBA from the United States. He discovers that all the young women in the city are eager to marry him, but he falls for Seetha, who is promised to be married by his father.
However, Raja soon realizes that Seetha has ulterior motives and tries to escape her clutches. Meanwhile, Karthik's character also runs into Chitra, a free-spirited girl being pressured by her relatives to marry one of them.
The movie is an out-and-out comedy entertainer, with hilarious obstacles hindering the characters' attempts at love and marriage.