The 25-year old actress reportedly hanged herself at her Juhu residence late last night.
According to the police her maid, watchman and neighbours are being interrogated to find out her last visitors.
Jiah made her acting debut in the controversial Ram Gopal Varma's 'Nishabd' where she acted opposite Amitabh Bachchan. Upon its release in March 2007, the film received mixed reviews, but Jiah was noted for her confidence, attitude, and sex appeal.
She also got a Filmfare Best Debutant Nomination. She then appeared alongside Aamir Khan in A R Murugadoss's 'Ghajini', the Hindi remake of the director's own Tamil film of the same name.
Later she appeared as a supporting actress in Sajid Khan's multi starrer comedy film 'Housefull' (2010). This was her last film.