The two-minute-31-second clip with a dark and intense tone features Aishwarya in the role of a lawyer racing against time to save her daughter.
Irrfan Khan, who is working for the first time with 41-year-old actress, will essay the role of a cool cop, mouthing cheeky one liners.
Director Sanjay Gupta shared the trailer on his Twitter account after series of unedited pictures from the sets.
"H E R E I T IS... J A Z B A A Theatrical Trailer. bit.Ly/trailerjazbaa #JazbaaTrailer," he wrote.
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Her actor husband Abhishek Bachchan and close friend Karan Johar were among others to post the link on the micro-blogging site.
"Garma garmi shuru..... @JazbaaFilm
https://m.Youtube.Com/watch?feature=youtu.Be&v=nx7z1enCLWs..., " Irrfan tweeted the link.
Also featuring veteran actress Shabana Azmi and Jackie Shroff in pivotal roles, "Jazbaa" is set to hit theatres on October 9.