The 72-year-old actor, who will share screen space with Kangana in a Rajkumar Hirani-directed commercial, took to Twitter to share his excitement.
"At work at last with the wonder called Kangana Ranaut... She be so good... And talented and wonderful," he wrote along side a picture of the duo.
The 'Piku' star also praised 'PK' director Hirani. "And the other wonder Raju Hirani on set in making!"
Bachchan, who is seen sporting a fake full beard look for the advertisement, said even though sticking a beard is a 'curse', the final result makes it worth the effort.
"A curse for me when beards have to be stuck on... But the end results and the camera make it so believable."