The duo is acting together after four years to endorse Kalyan Jewellers Mudhra collection.
The jewellery brand has roped in Jaya Bachchan as its most recent brand ambassador, a statement said, adding the Mudhra collection comprises fine antique handcrafted jewellery.
"Kalyan Jewellers' initiative to bring Indian cinema's iconic couple together to launch the collection is in line with the strong and timeless appeal of the Mudhra collection," the company said.
"Sharing the screen with Jaya has always been special and I look forward to many more Kalyan Jewellers precious moments with her," said Amitabh.
"The attributes of the Mudhra collection presented the perfect platform to introduce the first family of Indian cinema as the brand ambassadors," T S Kalyanaraman, CMD of Kalyan Jewellers, said.