With Waheeda Rehman and Rati Agnihotri on the sets of his film, 'Coolie'.

Amitabh Bachchan autographs a copy of his book, 'Amitabh Bachchan: The Legend', for actress Pooja Batra and Rahul Mahajan.

Amitabh Bachchan seen clicking photos of monkeys on the sets of his film.

Amitabh Bachchan admires caricatures at an exhibition held by Raj Thackeray in 1999.

Sholay team: Amitabh Bachchan, Dharmendra, Sanjeev Kumar and Amjad Khan.

Amitabh Bachchan with the legendary Dilip Kumar.

In this candid picture, Amitabh Bachchan plays director in between shots of his film.

(Clockwise) A young Amitabh Bachchan with his mother Teji Bachchan, wife Jaya, father Harivansh Rai Bachchan and brother Ajitabh.

Tennis star Mahesh Bhupathi and Amitabh Bachchan during an exhibition match against Leander Paes and his celebrity partner Naseeruddin Shah.

Amitabh Bachchan surrounded by autograph hunters on sets of one of his films.

Amitabh Bachchan and Rakhee in a still from their film Bemisaal. The duo had worked in films like Lawaaris, Ek Rishtaa, Barsaat Ki Raat, Reshma Aur Shera and others.

Amitabh Bachchan with Jaya Prada and Radhika in Aaj Ka Arjun.

Born on October 11, 1942, Amitabh Bachchan's actual surname was Shrivastava. His father, acclaimed poet Harivansh Rai Bachchan, had adopted the pen name, Bachchan. So, the family adopted this surname. Big B was initially named Inquilaab, inspired by the phrase Inquilab Zindabad. In picture: Amitabh Bachchan with parents Harivansh Rai and Teji Bachchan.

Amitabh Bachchan and industrialist Parvez Damania at Mumbai's Wankhede stadium watching a limited-overs cricket match played between the 1983 World Cup-winning team and 1999 World Cup team.

Shatrughan Sinha and Amitabh Bachchan, the duo have starred together in films like Bombay To Goa (1972), Dostana (1980), Kaala Patthar (1979) among others.

Abhishek Bachchan, Amitabh Bachchan and Aamir Khan during the preview of the music of Rakeysh Omprakash Mehra's 'Aks'.

Amitabh Bachchan greets noted comedian Mehmood. Lyrist Majrooh Sultanpuri can be seen in the foreground.

Amitabh Bachchan playing Table Tennis at NSCI, Worli.

Amitabh Bachchan and Qurbani star Feroz Khan.

Big B had also recalled his childhood birthdays when his father, the late poet Harivansh Rai Bachchan, would always compose and recite a poem for him. "It was a family tradition," the veteran actor recalled, adding: "But this tradition took an entirely new definition when, after my near-fatal accident in 1984 (when he nearly lost his life after a shooting accident on the set of 'Coolie'), my father recited my birthday poem. It was like a new life for me. While reading the poem my father broke down. It was the only time I've seen him like that." In picture: A young Amitabh Bachchan in his school photo.

The great Hrishikesh Mukherjee with Amitabh and Vinod Mehra while shooting for Bemisaal.

Amitabh Bachchan on his wedding day. Big B married actress Jaya Bhaduri in 1973. The couple has appeared in several films together, such as Zanjeer, Abhimaan, Bansi Birju, Ek Nazar, Mili and Kabhi Khushi Kabhie Gham.

Amitabh Bachchan on the sets of Mrityudand.

Dharmendra and Big B. The duo has given one of Hindi cinema's most successful films - Sholay.

Amitabh Bachchan with the late actress Sridevi.

A still from Alaap starring the legendary pair of Big B and Rekha. The much-loved on-screen jodi worked in films such as Mr. Natwarlal, Do Anjaane, Namak Haraam, Ganga Ki Saugand, Alaap, Silsila and others.

(From Left) Amitabh Bachchan, Salman Khan, Sanjay Dutt and Aishwarya Rai.

Amitabh Bachchan and Mithun Chakraborty. The duo starred together in the iconic film Agneepath (1990).

Despite being 78 years old, Amitabh Bachchan is among the most handsome men in the industry. Don't you agree with us? Wishing the legend, a very happy birthday!

Amitabh Bachchan during a game of cricket on the sets of one of his films.

Kapil Dev and Amitabh Bachchan at an event.

Amitabh Bachchan is an alumnus of Sherwood College, Nainital. He later attended Kirori Mal College, University of Delhi. In picture: A young Amitabh Bachchan from a rare family photo.

Amitabh Bachchan and his son Abhishek.

A rare photo of Amitabh Bachchan at his father Harivansh Rai Bachchan's felicitation ceremony. Harivansh Rai was a mighty follower of Atal Bihari Vajpayee's oratory skills.

Kajol and Ajay Devgn with Amitabh Bachchan in the early 90s.

A still from Amitabh Bachchan's debut film, Saat Hindustani. While shooting this film, Bachchan said he was in a terribly frightful challenge to give a shot right in the first take as they were working with a limited budget and film stock.

Amitabh Bachchan in a still from, 'Reshma Aur Shera'.

On April 28, 2020, Big B shared this picture on Instagram with the quirkiest caption, which read: Somebody was explaining to me why I was not getting the big numbers on Instagram, unlike all the other young generation. He said, "because you can't put up a pic in a bikini" And suddenly this one popped up.. not quite a bikini, it's more 'bhara hua kini'. from my film MAHAAN .. triple role .. and today 37th year of its release!!

Amitabh Bachchan with his little daughter Shweta Bachchan. A doting father is helping his little one with her bathing suit.