Title of the film was suggested by Kiron Kher, wife of famous actor Anupam Kher, who also played father to Shah Rukh Khan in the film.
Saif Ali Khan turned the role of Raj Malhotra and even Tom Cruise was considered as the first choice for the role.
Aditya Chopra named Shah Rukh Khan's character Raj after legendary actor Raj Kapoor.
Director Karan Johar made a brief on screen appearance in the film for the first time in this movie.
"Mere Khwabo Main Jo Aaye" was the first song to be recorded. Aditya Chopra rejected 24 verses by Anand Bakshi before approving this one.
When Raj drops Simran in the song "Ruk Ja O Dil Deewane", Aditya Chopra did not tell her what was going to happen, so as to make her reaction look genuine.
Aditya Chopra had a great difficulty filming the scene where Raj tells what happened previous night in a hotel room in Switzerland as every time he started speaking his dialogue, Simran bursts into laughter.
The lipstick marks were drawn by Kajol aka Simran herself.
The song "Mehndi Laga ke Rakhna"was actually written for some other film.
The film marks first commercial role of theatre actor Mandira Bedi.
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