This film was inspired by a true story.

Humko Deewana Kar Gaye is Katrina Kaif's first movie with Superstar Akshay Kumar

Salman Khan was to play Anil Kapoor's role but opted out.

Katrina Kaif's voice is dubbed in the film by a dubbing artiste.

Bipasha Basu was angry her special appearance was advertised in posters and trailers. . She was upset because it made her look like she had a full role in the film when she did not.

Lara Dutta was signed for the film but replaced by Bipasha Basu .

Bhagyashree's first mainstream Hindi film in 13 years.

Anil Kapoor and Bipasha Basu's roles were kept under wraps until the film released.

Music of film was given by Anu Malik due to popularity of Himesh Reshamiya those days promotional song Tum Sansoon Main was recorded in his voice which also had music by him,

Raj Kanwar had told the media that film is based on real life couple who were engaged to different people before their marriage and has also shown them in one of the scenes in the film which was during a party celebration scene.

The only film to have Anu Malik and Himesh Reshmaiya as music directors who also sung in the film.

Anil Kapoor and Akshay Kumar worked together for second time.

Helen's name in the film is Kitty Kohli similar to her name in Gumnaam 1965 as Kitty Kelly.

Mona Ghosh Shetty had dubbed for Katrina Kaif where in Katrina Kaif had promised Raj Kanwar that if she works in his next film she would dub her own voice.

Anu Malik was upset with film makers for bringing on Himesh Reshamiya as second music director as he never does soundtracks where he has to share sound-space with others.

The title of the song "For Your Eyes Only" was taken as a parody on the film " For Your Height Only" starring Weng Weng.

Hum Kisse Kum Nahin (2002) - Dulhe Raja the entire opening tune was turned into "Bhule Denge Tumko Sanam" from Humko Deewana Kar Gaye (2006)

Akshay and Katrina were paired for the first time , later they went on to form a successful onscreen pair giving big hits like Namaste London, Welcome, Singh is King. Ironically this movie was just an average grosser at box office