Poove Unakkaga is one of the classic Tamil movies of Vijay and a work that brought to him major fame. It marked a distinct phase in the actor's career that elevated his image from a youth actor of low-budget movies to a successful superhero who could deliver well on strong character stories. The title could be roughly translated as "A flower for you". The movie was a big hit as it portrayed love in a very way and also involved reunion of estranged families that is a traditional theme for many successful Tamil movies.
Nagesh and Nambiar have been college day best friends and so are their children Jaiganesh and Vasudevan. Jaiganesh's family members are Christians while Vasudevan's are Hindu. Jaiganesh's son is Lawrence and Vasudevan's daughter is Anju Aravind. Robert, brother of Jaiganesh, and Janaki, sister of Vasudevan, fell in love with each other. Against their families will, they marry each other and run away from their homes. Ever since then, both families hate each other and Raja (Vijay) wants to solve the problem. So he comes to the village along with his friend Charlie. Raja and Charlie find accommodation in the house of a loud, frightful Velingiri. Later, both of his aunts appear before him with marriage proposal, but in order to avoid it, he says he is married to a Hindu-Christian like himself. Here comes Sangeetha, who pretends to be his wife. However, when he gives her the duty of a wife, she reveals that she is the real child and only daughter of Robert and Janaki and asks Raja why he is acting as the grandson of Nagesh and Nambiar. Next to his rented house, which he shares with Charlie, there is a ladies hostel which features Anju Aravind. As she and her group were trying to find a good tune to a song for a contest, Raja indirectly helps her and falls in love while she treats him as a good friend. As he was about to notify Anju Aravind, of his love for her, she notifies Raja of her love for Lawrence. Hearing their plan to marry without their parents consent because of the Robert-Janaki problem, Raja decides to pose as the son of who ran away couple. Now, both Raja and Sangeetha carry out this mission and when he is seen helping out the lovers in their ways of marrying, Anju Aravind's father gets notified of this and so the news as fire, gets spread quickly and both families now think they have run away and want to kill the members of the other. Meanwhile, Raja has rejoined the friendship of the aunts and the grandparents so the uncles and the lovers is his main concern. He does this at once in style. After the marriage, the truth of Raja's appearance is revealed, and when he is asked to marry Sangeetha, he replies a "no" because he only loves Anju Aravind and he can't forget her.
Vijay’s career took a U-turn after the mega success of Poove Unakkaga which was a silver jubilee hit. It ran for 210 days.
It was remade in Hindi by Satish Kaushik as Badhaai ho Badhaai.