Rani Mukerji plays a character named Pooja while Kareena Kapoor plays a character named Tina. Rani's played a character named Tina in Kuch Kuch Hota Hai (1998) while Kareena played a character named Pooja in Kabhi Khushi Kabhie Gham... (2001), both incidentally directed by Karan Johar
To make the song "The Medley", the music director Rahul Sharma chose 18 songs from earlier films from a possible 250. The lyrics from those songs were used to express the way the characters were feeling in the present. The Medley became popular, especially because of the lyrics from the Kaho Naa Pyaar Hai title song, Kuch Kuch Hota Hai title song, and Mehndi Laga Ke Rakhna from Dilwale Dulhania Le Jayenge were used in the medley. Kaho Naa Pyaar Hai starred Hrithik Roshan, Kuch Kuch Hota Hai starred Rani Mukerji and Dilwale Dulhania Le Jayenge had Satish Shah.
This is the only movie where Hrithik Roshan and Rani Mukherji were paired opposite each other. Earlier they acted in Kabhi Khushi Kabhie Gham, but the former appeared in the second half of the movie, while the latter appeared in the first half, and therefore, they did not share any scenes.
Kareena Kapoor 3rd film with Hrithik Roshan after K3G (2001) and Yaadein (2001).
The DVD for this movie released right away, because there was a lot of piracy problems with Yash Raj Films at the time