Mumbai, Feb 22: Megastar Amitabh Bachchan has sung and composed a song for his upcoming film "102 Not Out". 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. "Those apprehensions still remain... It is a torture to be given the decision of picturising a song, of being asked to dance... To get it right... To the fear of repeated mistakes... Particularly when in the open spaces of an outdoor where millions watch you... Watch you making mistakes and retakes..." he said.

The film is being helmed by "Oh My God!" director Umesh Shukla. The movie, which is based on Saumya Joshi’s Gujarati play of the same name, will see Rishi Kapoor portraying the character of Bachchan’s 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.