| Year | Film | Role | Notes |
|---|
| 2000 | Refugee | Naaz | Winner, Filmfare Best Debut Award |
| 2001 | Mujhe Kucch Kehna Hai | Pooja Saxena | |
| Yaadein | Isha Singh Puri | |
| Ajnabee | Priya Malhotra | |
| Asoka | Kaurwaki | Nominated, Filmfare Best Actress Award |
| Kabhi Khushi Kabhie Gham | Pooja "Poo" Sharma Raichand | Nominated, Filmfare Best Supporting Actress Award |
| 2002 | Mujhse Dosti Karoge! | Tina Kapoor | |
| Jeena Sirf Merre Liye | Pooja/Pinky | |
| 2003 | Talaash: The Hunt Begins... | Tina | |
| Khushi | Khushi Singh (Lali) | |
| Main Prem Ki Diwani Hoon | Sanjana | |
| LOC Kargil | Simran | |
| 2004 | Chameli | Chameli | Winner, Filmfare Special Performance Award |
| Yuva | Mira | |
| Dev | Aaliya | Winner, Filmfare Critics Award for Best Performance |
| Fida | Neha Mehra | First villain role |
| Aitraaz | Priya Malhotra | |
| Hulchul | Anjali | |
| 2005 | Bewafaa | Anjali | |
| Kyon Ki | Dr. Tanvi Khurana | |
| Dosti: Friends Forever | Anjali | |
| 2006 | 36 China Town | Priya | |
| Chup Chup Ke | Shruti | |
| Omkara | Dolly Mishra | Winner, Filmfare Critics Award for Best Performance & Nominated, Filmfare Best Actress Award |
| Don - The Chase Begins Again | Kamini | Cameo |
| 2007 | Kya Love Story Hai | Herself | Special appearance (Item number) |
| Jab We Met | Geet | Releasing on October 26, 2007 |
| Halla Bol | | Special appearance |
| 2008 | Milenge Milenge | | Post-production |
| Tashan | | Filming |
| Golmaal Returns | | Announced |
| Lajjo | Lajjo | Pre-production |
| Roadside Romeo | | Pre-production. Voice over for first animated film |
