`Kabhi Khushi Kabhie Gham...`, which also starred Amitabh Bachchan, Jaya Bachchan, Kajol and Kareena Kapoor Khan in pivotal roles, completed 14 years since its release on Monday.
Karan posted on Twitter a video of 1962 science fiction animated children's television show `Fireball XL5`, which followed the missions of spaceship Fireball XL5, commanded by Colonel Steve Zodiac of the World Space Patrol.
`'Fireball XL5' - Start and Theme Song - YouTube who remembers this? #childhoodtelevision,` the `My Name is Khan` director captioned the video.
Taking an idea from that, Hrithik asked Karan to shoot the sequel to `Kabhi Khushi Kabhie Gham...` in space.
`@karanjohar let's go to space in your next! 'K3G' part two. Family mission to resolve alien family dramas on other planets,` Hrithik tweeted on Wednesday.
Karan also used the micro-blogging site to praise Amitabh and Jaya for their performance, and said that the couple `blessed the film with their royal screen presence and magnetism`.
Meanwhile, Amitabh also shared some memories from the shooting of `Kabhi Khushi Kabhie Gham...`. Amitabh then shared that Karan `fainted on the first day of our shoot`.
To that Karan replied: `I was nervous because it was day one with you Amit uncle @SrBachchan`.
