Balan, who won critical acclaim for her work opposite the actor in Parineeta, will feature with Khan in a new project, reports NDTV.
A source revealed that the two stars would share screen space in Dream Sequence: "Initially, Deepika Padukone was to do the role. The casting of the duo together after Love Aaj Kal had its appeal.
"But the actress begged off when she heard that the chote nawab was having second thoughts and that Abhay Deol would fill in for him."
The project is to release under Balaji Motion pictures and will be directed by Vishal Bhardwaj.
"The actress, director and producer are keen to work together in this film and are currently working on the dates, " added the source.
Mariah Carey has described the "lovely experience" of working with her mother on her latest album, and hopes to record more material with her in the future.
Patricia Carey - who usually performs opera - recorded vocals on her daughter's festive compilation Merry Christmas II You, on the tracks 'O Come All Ye Faithful' and 'Halleluiah Chorus'.
Mariah revealed to People that there may be more duets between the pair in the future: "Many people know that my mother is a trained opera singer, so I guess it was only a matter of time before we both got onto a record together.
"It was a lovely experience being in the studio together, and I'm very happy that I have this documented for the rest of my life."
