Imagine being teased by your father about writing a love letter, well that's exactly what Amitabh Bachchan is doing to Rishi Kapoor in 'Bachche Ki Jaan', the first song from '102 Not Out', that's been released today. Sung by Arijit Singh, composed by Salim-Sulaiman and lyrics by Hiral Brahmbhatt, this lively peppy number builds on the unique father-son bond that we witnessed in the trailer.

At times joyful and poignant and at times funny and goofy, the foot tapping song gives us an insight into the kind of mischievous yet emotional relationship the 102-year-old father shares with his 75-year-old son.

What makes Bachche Ki Jaan truly special is the fact that Amitabh Bachchan and Rishi Kapoor have teamed up as father and son for the first time ever. From their chemistry to their comic timing, 'Bachche Ki Jaan' is sure to make you laugh and warm your hearts!

Click here to watch the song.

Talking about the track, director Umesh Shukla says, "It showcases the fun bond between a father and son. You will see Mr. Bachchan at his mischievous best, trying to tease his not-so-fun son, Rishi Kapoor. Arijit gives the song a magical spin. I can assure that 'Bachche Ki Jaan' is going to become a part of your life and you will catch yourself singing it every now and then."

102 Not Out', A Sony Pictures releasing International Presentation and worldwide distribution, is produced by SPE Films India, Treetop Entertainment and Benchmark Pictures. The film releases on May 4.