She had just completed the shooting of Mani Ratnam's Ashokavanam in Kerala.
According to the sources, Aishwarya will be staying there till the completion of the shoot and will be accompanying the unit for the outdoor schedules in Hawaii and Kulu Manali soon.
Sun Pictures, the movie division of Sun TV Network Limited had announced the decision to handle the production for Enthiran.
Starring Rajinikanth in dual roles, the film is slated to be one of the biggest projects in Indian cinema history.
According to Rajini, Enthiran is a world class movie and will remain a milestone in the industry.