The 75-year-old announced the news on Twitter and also shared some pictures from the shoot rehearsals of the track, which will be choreographed by noted choreographer Ganesh Acharya.
"Sung a song and composed it for '102 not out'... Rehearsals on with the great Ganesh... Shoots on in a few... It's BAADDUUUMBAAAA! TRUST ME..." Bachchan tweeted.
The actor also wrote on his blog that how even after almost 50 years in the industry he gets jitters when it comes to dance rehearsals and feels the nervous excitement when the song releases.
The film is being helmed by "Oh My God!" director Umesh Shukla.
The movie, which is based on Saumya Joshis Gujarati play of the same name, will see Rishi Kapoor portraying the character of Bachchans 75-year-old son.
The actor duo, who have worked together in films such as "Amar Akbar Anthony", "Kabhi Kabhie", "Naseeb" and "Coolie", will reunite on screen after 26 years.
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