Actress Trisha has replaced Nayantara in producer Aascar V. RavichandransBoologam. The beauty is all set to play Jayam Ravis leading lady in this action entertainer,which will be helmed by debutant director Kalyan Krishna. Ravichandran is producing the movieunder his Aascar Films banner. Vijay Antony will compose the films music. Trisha is currentlybusy with Vishal starrer Samar with director Thiru.