- The Imperial Institute of Technology in the film is the old name of the current Indian Institute of Technology.
- The campus that appears in the film is the campus of the Indian Institute of Management, where the crew filmed for 33 days.
- Rancho said in the film that some people first studied machinery, then management, and finally became bankers. This is precisely the trajectory of the novel author Chaten Begat. Zichateng Baigat first studied mechanics at the Indian Institute of Technology, then management at the Indian Institute of Management, and finally became a banker.
- The film was shot in cities in Delhi, Bangalore, Mumbai, and Shimla.
- The film’s producer, Chopra, once stated that "Three Idiots" will be available on YouTube within 12 weeks after its release in theaters-this will be the first Indian film to officially land on YouTube legally-but it is a pity , The video finally failed to appear on YouTube.
- After the film was released, it broke many records in the Indian box office. It is also the second best-selling Indian film overseas.
- Many gadgets invented by Indians are used in the film, such as the razor that uses the power of a bicycle to shear wool.
- Director Rakuma Hirani asked his older male protagonists to lose weight, and at the same time asked the female protagonist to gain weight. His approach was ridiculed by the crew as "the most idiotic director in history." But Hillani later defended that it was a joke he made to the crew.
- Amir Khan, who plays Rancho in the film, refuses to enjoy his birthday cake. When others ask him why, he replied that he only drinks milk and eats a little banana every day. For the role of Rancho, he wants to lose weight.
- Fahan used a Nikon manual film SLR camera at the beginning of the film. When he graduated, his father bought him a new camera, which was a Nikon DSLR.
- Volvo's XC-90 R-Design appeared in the film, which is a new SUV sedan from 2010.
3 Idiots behind the scenes gags
Top cast
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Farhan Qureshi: I've always been a law abiding citizen. But in the last 24 hours, I grounded an airplane, nearly flushed someone's remains down the toilet, and helped Pia escape her wedding. All for Rancho. He would've done the same for any of us, too, like stealing a copy of the final exam that was designed for Raju's failure.
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Chatur Ramalingam aka 'Silencer': [Chatur unzips his pants and presents his butt] Your Majesty, thou art great! Accept this humble offering!