The 'Dangal' star took to Twitter to share the new look where Zaira Wasim is seen walking on a bridge wearing a school uniform and carrying a backpack.
The tagline of the film reads, "Dream Dekhna Toh Basic Hota Hai"
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The poster also announces that the trailer of the film will be out on August 2.
'Secret Superstar' is a musical drama film, written and directed by the star's former manager Advait Chandan and produced by Aamir and his wife Kiran Rao.
The flick is set to have a box office clash with Rohit Shetty's 'Golmaal Again' on Diwali, thsi year.