"At Tanishq, the jewellery business of the Tata Group for their AV for endorsement. Jaya and I doing it together," Amitabh wrote on his blog bigb.bigadda.com.

The two will be seen together after Karan Johar's super successful family saga "Kabhi Khushi Kabhie Gham" in 2001 which also starred Hrithik Roshan, Shah Rukh Khan Kareena Kapoor and Kajol.

Amitabh and Jaya are latest to join the list of celebrity couples coming together for endorsement. Their son Abhishek and daughter-in-law Aishwarya teamed up for Lux soap comemrcials.

Other celebrity couple seen together are Ajay Devgn and Kajol in Whirlpool ads, Shah Rukh and Gauri Khan in D'decor and Saif Ali Khan and Kareena in Airtel ads.