Shah Rukh Khan, Salman Khan, Aamir Khan in a film
Sanjay Dutt, Saif Ali Khan, Salman Khan and Shah Rukh Khan dance to "Deewangi Deewangi" in Farah Khan's "Om Shanti Om"Screenshot/ YouTube

Bringing the reigning Khans of Bollywood – Shah Rukh Khan, Salman Khan, Aamir Khan – together is a mighty task. And only director Farah Khan came close to casting them in one frame in her reincarnation-romantic film, "Om Shanti Om".

Released in 2007, the movie had an extravagant song which featured industry's biggies. From Salman Khan, Sanjay Dutt and Govinda to Karisma Kapoor, Vidya Balan and Rani Mukerji, the choreographer-turned-director made everyone dance to her tunes.

While, watching Shah Rukh-Salman match steps in the song garnered much excitement (Note: this was before the major fall-out the two superstars had at a party), presence of perfectionist Khan would've been like a cherry on the cake.

The "Happy New Year" director had apparently made efforts to bring the "PK" actor on board, but he turned down the offer owing to prior commitments.

According to a Glamsham report, "Aamir was needed for four hours for the shoot. When contacted by Farah he told her that if he gave those four hours to her, his film "Taare Zameen Par" would get delayed by four months." Farah apparently did not proceed with the matter and decided not to deconstruct Aamir's "bizarre logic."

Did he refuse Farah's offer because of the discomfort he shared with rival Shah Rukh or was he really pressed for time? While that answer continues to be answered in different ways, ace Karan Johar added humour to the topic by saying he would get injured if he worked with all the three Khans.

"If I make such a film, I'll end up in a hospital (laughs). We can't make an Amar Akbar Anthony out of them. There aren't many stories available that can absorb three distinct superstars like these," Johar told NDTV during the promotion of his high school drama "Student of The Year."

Salman Khan has shared screen space with both Shah Rukh ("Karan Arjun", "Hum Tumhare Hai Sanam") and Aamir (Andaaz Apna Apna), but his co-stars haven't unfortunately worked with each other. The last time the two were spotted together was at a Producers' Guild meet in 2009.