"The Birthday boy. #happybirthdayBigB," Abhishek captioned the bright and lovely photograph, as he posted it on Twitter.

The photograph features Big B, his wife Jaya, daughter Shweta and daughter-in-law Aishwarya Rai along with Abhishek.

Megastar Amitabh Bachchan, who feels 'luckiest today', has thanked all those who have been in his life through happiness but also in 'loneliness'.

"To them that wish for me for my 72nd moving into 73rd...I have just few words...I am blessed to have you with me still! Thank you all for your affectionate greetings and love..they shall ever remain with me...I feel today the luckiest," he tweeted early on Saturday.

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