Updated On: 30 December, 2023 03:03 PM IST | Mumbai | mid-day online correspondent
Kaun Banega Crorepati 15: Bollywood actor Sara Ali Khan, who is famous for her ‘Knock Knock’ jokes on social media, exchanged a playful banter with megastar Amitabh Bachchan on the show

Pic courtesy/ Sara Ali Khan`s Instagram account and sonytvofficial`s Instagram account
The ‘Kedarnath’ fame actress appeared on the finale episode of the quiz-based reality show, along with her grandmother, legendary actress Sharmila Tagore. After the host, Amitabh welcomed the duo on the hot seat, Sara said: “Amit sir, knock knock.” The cine icon was left confused and asked what is "knock knock."
Replying to him, Sara said that he has to ask “who`s there?” The ‘Brahmastra’ actor nodded to the gorgeous actress and said, “Yes, who`s there?” Sara started the banter saying “Watch”, to which Amitabh said, “Watch who?” The ‘Simmba’ actress said laughing, “Watch us win Rs 1 crore.” The ‘Sholay’ actor then asked Sara, “Do you think you`re the only one who`s popular? I also know knock-knock.” “Knock knock,” said Big B, and Sara replied, “Who`s there?” Amitabh said, “Dense,” to which Sara said, “Dense who?” The 81-year-old actor said, "I`m impressed with your ‘confidence’. I hope that you will win crores of rupees today. And the special cause for which you both will play today, it will be donated towards it.”