Kolkata, Nov 7 (IANS): Bollywood megastar Amitabh Bachchan took a trip down memory lane on Gurpurab Thursday, and recalled his early days in Allahabad, his Sikh ancestry and how his mother, a Sikh, recited to him the Gurbani.

The 546th birth anniversary of the founder of Sikh religion, Guru Nanak Dev, was celebrated Thursday across India and abroad, including in neighbouring Pakistan.

On his official Facebook page, the silver screen icon reminisced his mother, a Sikh, singing the Gurbani (hymn) to him.

"Those early years in Allahabad, when Ma recited and sang the eternal pious and divine words of the Gurbani, in my ears... 'tati vaar na jaavaee...'

"My Mother as you know, a Sikh, Teji Kaur Suri, my grandfather Sardar Khazan Singh Suri, my Grandmother a Sodi, and whose family, her brothers and my Mother's Mama's were the Prabandhaks of the Anantpur Sahib Gurudwara...," Big B posted.

Amitabh arrived in Kolkata Sunday to shoot for "Vicky Donor" director Shoojit Sircar's upcoming film "Piku", where he plays the father to Deepika Padukone.

The 71-year-old took to Twitter earlier Thursday to greet his fans.

"Happy Gurupurb! Birth Anniversary of Guru Nanak Dev ji... 6th Nov... lakh lakh vadhaiyaan !!," Big B tweeted.