What was the South Indian actress Arya’s first debut south movie?

The South Indian actress Arya's first debut South Indian film is "Ullam Ketkume" which was a Tamil film directed by Jeeva and released in 2005. The film was a commercial success and it marked the beginning of her acting career in the South Indian film industry.

Arya has since then appeared in a number of Tamil, Telugu and Malayalam films, and has become one of the most popular and successful actors in the South Indian film industry.