Best Tamil Action Movies of 2003
Ranked by IMDb rating — 15 Tamil action films released in 2003.

Kaakha Kaakha
After a police team kills his brother, a drug-dealing gangster vows to kill the entire team and their respective families.

Three Roses
Three women (Rambha, Jyothika, Laila) spring into action after the arrest of their friend.

Iyarkai
Marudhu, a sailor, falls in love with Nancy, a fruit vendor. However, she waits for the captain who had promised that he would return and marry her.

Thennavan
Thennavan is a 2003 Indian Tamil action film written and directed by newcomer M. Nandakumaran

Anjaneya
DCP Paramaguru goes undercover to infiltrate the mafia and find incriminating information against them. He takes the help of his friend, Divya, with whom he falls in love eventually.

Parasuram
An underground terror group led by a mysterious proxy Akash recruits unemployed youth and turns them into suicide bombers. Asst. Commissioner of Police Parashuram decides to take the case into his own hands in a fit of patriotic fervor.

Arasu
The film opens with Arasu (Sarath Kumar) murdering a person in Mumbai. Later the story shifts to Kumbakonam where he is an assistant to a temple priest (Delhi Ganesh). Soon the priest’s daughter Meera (Simran) falls in love with Arasu.

Alai
Aathi and Meera fall in love after the usual playful tiffs. On a visit to a friend's village for his marriage, the two of them help the friend stand up against his father and wed his sweetheart instead of the girl his father had fixed up his marriage with.

Jayam
A young woman's marriage is arranged with her first cousin by her parents during her childhood, but she falls in love with another guy. When the parents fix her marriage with the cousin, she elopes with her lover.

Thithikudhe
A remake of the Telugu movie manasantha nuvve (2001).Chinnu and Anu are childhood friends who live in a village. Anu’s father gets transferred and relocates to another place with his family which makes Anu lose contact with Chinnu.

Thiruda Thirudi
Vasu belongs to a lower-middle-class family and is irresponsible and untrustworthy. Viji is from a Telugu traditional family and is an ambitious and career-oriented girl.Vasu and Viji meet up and one day, Vasu follows her on her two wheeler.

Winner
A young man moves to his hometown; here he falls in love with the village head's daughter. The village head learns about this and he has the girl abducted; if the young man tries to rescue her, his parent's life will be at stake.

Thirumalai
A chance meeting on New Year's Day leads a young mechanic to a romance, but the father of his new girlfriend is not pleased.The highly commercial success of the film lead to be remade in Telugu as Gowri in the year 2004.

Dhool
A kind-hearted but tough villager goes to the city to meet a minister regarding a chemical factory that is polluting the local river.

Saamy
Aarusaamy is the Deputy Commissioner of Police of Tirunelveli who efficiently brings the city under control. Aarusaamy arrives at Tirunelveli after being in exile for some years after being wrongly accused of bribery by corrupt politicians.