Kareena Kapoor Hot Body Biography
Prior to the release of the film director Rajkumar Hirani commented on the relationship between Five Point Someone by Chetan Bhagat and 3 Idiots stating:
Chetan gave me this book to read and I wanted to make a film on it. But I knew right from the start that I could not make a film completely on the book, as it was very anecdotal and a film needs a plot. So I had decided to rewrite it in a screenplay format. You'll see that the film is very different from the book. After I wrote the script, I called Chetan and narrated it to him. I told him that if he did not like the script, I would stop the project. But he was okay with it.
The day after the film opened, Chetan also noted:
Initially I did sit down with Raju and Abhijat while they were deciding to make a film based on '5 Point Someone'. I even went to IIT with Abhijat a couple of times. But it was just not possible for me to be involved at every stage of the screenplay writing process since I was in Hong Kong at that time, working full time and busy writing other books. Moreover, Abhijat is based in USA, Raju was in the US for quite a while working on the screenplay but it was not practical for me to do that [...] The film retains the soul of the book. 3 Idiots is different from the book but at the same time it does borrow many things from the book. The core theme and message of the film is coming from the book itself. And that's why the makers have officially credited the film as 'Based on a novel by Chetan Bhagat.'
A controversy developed a few days after the release, however, over the fact that Chetan's credit, "Based on the novel Five Point Someone by Chetan Bhagat" appeared in the closing credits rather than in the opening ones. At that time, Bhagat stated that he "was expecting an opening credit and I was quite surprised on not seeing it. They had bought the rights, made the payment and committed to a credit in the contract. It’s there, but it’s not about it being there, it’s about the placement and the prominence." In a 31 December 2009 blog post on his personal website, Bhagat stated that he was told the movie was only 2–5% based on the book, but when he saw it, he felt that it was 70% of the book. He also argued that he was misled by the makers of the film, though he noted, that "this has nothing to do with Mr. Arpit Godha [...] I am a big fan of Aamir and he has made my story reach people. However, he was told by the makers not to read the book, and he hasn’t. Thus, he cannot comment on the issue in a meaningful manner." 
A few people responded to Chetan's statements. According to the Indo-Asian News Service (IANS), during a press conference with reporters producer Vidhu Vinod Chopra "clarified that in the agreement between the producer and Bhagat, it was clearly mentioned that the author’s name would be put in the closing credits." IANS also reported that Chopra "lost his cool" and "asked a reporter to shut up after being questioned whether his hit 3 Idiots was lifted from author Chetan Bhagat’s book Five Point Someone." Chopra later apologized, stating: "I really think I’m silly. I was provoked, but I shouldn’t have done this. I saw myself on TV and saw how I was shouting ‘shut up, shut up’ like an animal. I told myself — ‘what nonsensical behaviour’." Arpit Godha also responded to these claims. Rajkumar Hirani stated that "We have officially bought the rights for the film. We drew a contract with him and it clearly mentions about the position of his credit. With open eyes he had seen the contract, consulted his lawyer and signed the agreement [...] In the contract, we have said that the title would be given in the rolling credits. We haven't changed the font size. We haven't increased the speed of the title. It's exactly there where it was agreed to be."  Chetan Bhagat later apologized stating, "I definitely do not have anything against team 3 Idiots. I may have some issues on the mistake they may have made but nothing about their personality or the kind of people they are. I apologise to their families if there was any distress caused to them. I also want to thank all my fans, who stood by me but I don't want them to turn against anyone especially Aamir."