"She is a team player. She is a military on the set. She completely surrenders herself and the amount of homework she does and comes prepared on the sets is commendable," the director said.
Aishwarya, who is making a comeback on the silver screen with Sanjay's "Jazbaa", is playing a lawyer and a mother, who is threatened to fight the case of a rape and murder-accused criminal.
The film, which also stars Irrfan Khan, Shabana Azmi and Jackie Shroff among others, is slated to release on Friday.