The 73-year-old, who looked dapper in a black suit, was in Vigyan Bhavan here on Tuesday to receive the award instituted by the government of India for his portrayal a Bengali father in 'Piku'.
While addressing a gathering at the award ceremony, Mukherjee called Amitabh a "living legend". The cine icon took to Twitter on Wednesday morning where he shared that he is "truly touched" by the mention.
"Back now 3:54 am from Delhi and National Award! So humbled and touched, for President of India to take my name in his speech!" Amitabh tweeted.
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"Truly touched, deeply humbled and honoured by the President's mention of me in his speech..." he wrote.
Big B was accompanied with his wife Jaya, son Abhishek, daughter Shweta Nanda and daughter-in-law Aishwarya Rai Bachchan for the award event.
This is not the first time that the 'Wazir' star has been conferred with a National Award. Amitabh won the prestigious award thrice for films like 'Agneepath', 'Black' and 'Paa'.