Megastar Amitabh Bachchan gladly obliged the actors of "Student Of The Year" when they requested him to match steps with them on the new age version of "Disco deewane".

Film director Karan Johar and his actors - Varun Dhawan, Alia Bhatt and Sidharth Malhotra - were on the sets of "Kaun Banega Crorepati 6", hosted by Amitabh, when they shook a leg with him.

The boys were awestruck with Big B's persona and when they made their way to the hot seat, they couldn't concentrate on the game, says a source.

Later, Sidharth and Varun requested the veteran star if he could groove a bit to their disco song from the film and he agreed. The boys taught Big B signature steps of the song, and he easily matched them.