The 73-year-old actor, who was attending a awards event on Friday, will be seen sharing screen space with Taapsee for the first time.
Asked how it was to work with a newcomer like her, Big B told media here: "They are not new comers. They are professionals".
"Pink" will be Amitabh's third movie with Sircar after 'Shoebite' and 'Piku', which also featured actress Deepika Padukone.
What is 'Pink' about and will he be seen playing a lawyer?
"We have just started. I don't think I am authorised to speak much about the film. Some of the photographs suggest that (I am playing a lawyer). You have to wait for a while to know," added the thespian.
Sircar, who was also present at the event along with the 'Shamitabh' star at the award gala, refused to comment or share details about his upcoming production.
Amitabh, who was last seen onscreen in filmmaker Bejoy Nambiar's 'Wazir', will next be seen in debut director Ribhu Dasgupta's 'TE3N', which also features actors Nawazuddin Siddqui and Vidya Balan.