"Back from 2 episodes of KBC.. The 2nd with HNY stars .. Great fun... And then a quiet dinner with the family... To bring in 11th!," Bachchan tweeted last night.
"Thank you all for your affectionate greetings and love .. they shall ever remain with me... I feel today the luckiest !!"
The contemplative star also shared his feelings on his blog.
"The hour has passed and the greetings have poured in and the family has been with me and that is the greatest gift, if gifts were to be any judge of affection...," Bachchan wrote.
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Bachchan seemed wistful as recalled his earlier days, saying, "There is a numbness in all that we do now... As opposed to the gaiety and laughter and excitement of the earlier years... I have always wondered why... But it there and it shall remain I presume for the days left in my life.. Its been a long day (sic)."
The megastar also thanked his millions of fans on Twitter for their wishes, saying he felt blessed to receive so much love.
His actor son Abhishek shared two pictures of himself with his father, mother Jaya, actress wife Aishwarya and sister Shweta Nanda.
Born to Hindi poet Harivansh Rai Bachchan and Teji Bachchan in Allahabad on October 11, 1942, Bachchan is the only actor of his generation to have an active and busy career even today notwithstanding his age and popularity of current generation's stars.