Karan captioned the post, "An entire lifetime of memories, in a heartbeat! This film gave so much more than just that - it gave me joy, unbreakable bonds, a different lens for story telling and of course - the last film set I could be on with my father. And for that, I will forever be grateful to this film!#19YearsOfKalHoNaaHo"

Preity Zinta and Saif Ali Khan share a goofy moment in between shots!

Shah Rukh Khan takes over the camera to capture his producer and close friend KJo.

Director Nikkhil Advani and Karan captured in a pensive moment. Kal Ho Naa Ho was Advani's directorial debut.

Karan shares a cute moment with Athit Naik who played Preity's younger brother Shiv in the film.