October 11 is Amitabh Bachchan’s 80th birthday. Affectionately called "Big B", the beloved Bollywood actor rose to fame in the early 1970s on the back of roles in hit movies such as Zanjeer and Sholay.

Active in the film industry since 1969, he has worked on more than 200 titles and is still continuing his acting career.

Bachchan, who has won multiple awards for his acting, is also the host of Kaun Banega Crorepati, India's version of Who Wants to be a Millionaire — one of the most watched shows on Indian television for 20 years.

Earlier this week, his wife Jaya and son Abhishek, who is also an actor, surprised him on the set of Kaun Banega Crorepati by planning a special episode dedicated to him for his birthday. Abhishek shared a behind-the-scenes video of setting it up on social media.

“It took a lot of secrecy, a lot of planning, a lot of hard work and a lot of rehearsals to get it right. But then again, he deserves no less,” he wrote in the caption. “It was very emotional to be able to surprise dad and celebrate his 80th birthday at the place he loves the most, his workplace.”