| Year | Film | Role | Other notes |
|---|---|---|---|
| 2001 | Ajnabee | Sonia/Neeta | Winner, Filmfare Best Female Debut Award |
| 2002 | Takkari Donga | Panasa | Telugu film, Dubbed into Hindi as Choron ka Chor |
| Raaz | Sanjana Dhanraj | Nominated, Filmfare Best Actress Award | |
| Aankhen | Raina | Special appearance | |
| Mere Yaar Ki Shaadi Hai | Ria | Special appearance | |
| Chor Machaaye Shor | Ranjita | ||
| Gunaah | Prabha Narayan | ||
| 2003 | Jism | Sonia Khanna | Nominated, Filmfare Best Villain Award |
| Footpath | Sanjana Rai Shingla Khan | ||
| Rules - Pyaar Ka Superhit Formula | Special appearance | ||
| Zameen | Nandini | ||
| 2004 | Ishq Hai Tumse | Kushboo | |
| Aetbaar | Ria Malhotra | ||
| Rudraksh | Gayetri | ||
| Rakht: What If You Can See the Future | Drishti | ||
| Madhoshi | Anupama Kaul | ||
| 2005 | Chehraa | Megha | |
| Sachein | Manju | Tamil film Guest appearance | |
| Viruddh | Special appearance | ||
| Barsaat | Anna | ||
| No Entry | Bobby | Nominated, Filmfare Best Supporting Actress Award | |
| Apaharan | Megha | ||
| Shikhar | Natasha | ||
| 2006 | Hum Ko Deewana Kar Gaye | Sonia Berry | |
| Darna Zaroori Hai | Varsha | ||
| Phir Hera Pheri | Anuradha | ||
| Alag | Special appearance in song Sabse Alag | ||
| Corporate | Nishigandha Dasgupta | Nominated, Filmfare Best Actress Award | |
| Omkara | Billo Chamanbahar | Special appearance | |
| Jaane Hoga Kya | Aditi | ||
| Dhoom 2 | ACP Shonali Bose/ Monali Bose | Double role | |
| 2007 | Nehlle Pe Dehlla | Pooja | |
| No Smoking | Special appearance in song Phook De | ||
| Om Shanti Om | Herself | Special appearance | |
| Dhan Dhana Dhan Goal | Rumana | ||
| 2008 | Race | Sonia | |
| Bachna Ae Haseeno | Radhika/Shreya Rathod | Nominated, Filmfare Best Supporting Actress Award | |
| Rab Ne Bana Di Jodi | Special appearance in song Phir Milenge Chalte Chalte | ||
| 2009 | Aa Dekhen Zara | Simi Chatterjee | |
| Pankh | Alter-ego of Maradona Rebello | Filming | |
| Lamhaa | Filming | ||
| Sob Choritro Kalponik | Radhika | Bengali film | |
| Chaimera | Announced Hollywood film |
