3 Idiots cast and credits
| Rajkumar Hirani | Director |
| Abhijat Joshi | Dialogue Editor |
| Rajkumar Hirani | Dialogue Editor |
| Abhijat Joshi | Screenplay |
| Rajkumar Hirani | Screenplay |
| Vidhu Vinod Chopra | Producer |
Aamir Khan
|
Ranchoddas 'Rancho' Shamaldas Chanchad/Phunsukh Wangdu |
Madhavan
|
Farhan Qureshi |
| Sharman Joshi | Raju Rastogi |
Kareena Kapoor
|
Pia Sahastrebuddhe |
Boman Irani
|
Viru Sahastrebuddhe (ViruS) |
| Omi Vaidya | Chatur Ramalingam (Silencer) |
| Rahul Kumar | Millimeter |
| Mona Singh | Mona Sahastrebuddhe (Pia's sister) |
| Javed Jaffrey | Ranchoddas Shamaldas Chanchad |
| Parikshit Sahni | Mr. Qureshi |
| Arun Bali | Shamaldas Chanchad |
| Amardeep Jha | Mrs. Rastogi |
| Farida Dadi | Mrs. Qureshi |
| Jayant Kripalani | |
| Sanjay Lafont | Suhas |
| Shantanu Moitra | Music Director |
| Shantanu Moitra | Playback Singer |
| Suraj Jagan | Playback Singer |
| Sharman Joshi | Playback Singer |
| Sonu Nigam | Playback Singer |
| Swanand Kirkire | Playback Singer |
| Shreya Ghoshal | Playback Singer |
| Shaan | Playback Singer |
| C.K. Muraleedharan | Cinematographer |
| Ranjeet Bahadur | Editor |
| Rajkumar Hirani | Editor |
| Vinod Chopra Productions |