New Delhi: The actress, who played a mother to Amitabh Bachchan in "Paa", appeared as a guest participant on the Kaun Banega Crorepati, to promote her forthcoming film"The Dirty Picture", which releases on December 2.

Clad in a red sari, Vidya  Balan oozed oomph just as her character in the film. Once on the show, she got host Amitabh Bachchan hooked to her dance moves - so much so that Big B even shook a leg to Oh la la.

The two worked together in "Paa", where Vidya mother to Big B's character Auro, who suffers from progeria. The episode featuring Vidya and Big B will be aired on Sony on Wednesday.