Amitabh Bachchan poses with Jaya Bachchan and his grandkids Aaradhya, Nayva, Agastya on his 81st birthday

The megastar Amitabh Bachchan is celebrating his 81st birthday on October 11. In the wee hours of Wednesday, Navya Nanda, daughter of Shweta Bachchan Nanda and Nikhil Nanda, shared an inside picture from his grandfather's birthday celebration and the photo soon went viral on social media.

Taking to her Instagram Stories, Navya posted a photo in which Amitabh can be seen with his wife-actress Jaya Bachchan, and his three grandkids Navya Nanda and his brother Agastya Nanda (who will be seen making his Bollywood debut in The Archies in December), and Aaradhya Bachchan, daughter of Abhishek Bachchan and Aishwarya Rai Bachchan.

Navya's mother Shweta Bachchan also posted a collage of four photos hugging her dad on his special day. "Happy 81st Papa, Big shoes (and hugs) no one can ever manage to fill", she captioned the click that she shared on her Instagram. Reacting to her post, Ranveer Singh dropped several heart emojis.