| Year | Film | Role | Notes |
|---|---|---|---|
| 2000 | Refugee | Nazneen "Naaz" Ahmed | Filmfare Award for Best Female Debut |
| 2001 | Mujhe Kucch Kehna Hai | Pooja Saxena | |
| 2001 | Yaadein | Isha Singh Puri | |
| 2001 | Ajnabee | Priya Malhotra | |
| 2001 | Asoka | Kaurwaki | Nominated—Filmfare Award for Best Actress |
| 2001 | Kabhi Khushi Kabhie Gham... | Pooja "Poo" Sharma | Nominated—Filmfare Award for Best Supporting Actress |
| 2002 | Mujhse Dosti Karoge! | Tina Kapoor | |
| 2002 | Jeena Sirf Merre Liye | Pooja / Pinky | |
| 2003 | Talaash: The Hunt Begins... | Tina | |
| 2003 | Khushi | Khushi Singh (Lali) | |
| 2003 | Main Prem Ki Diwani Hoon | Sanjana | |
| 2003 | LOC Kargil | Simran | |
| 2004 | Chameli | Chameli | Filmfare Award for Special Performance |
| 2004 | Yuva | Mira | |
| 2004 | Dev | Aaliya | Filmfare Critics Award for Best Actress |
| 2004 | Fida | Neha Mehra | |
| 2004 | Aitraaz | Priya Saxena / Malhotra | |
| 2004 | Hulchul | Anjali | |
| 2005 | Bewafaa | Anjali Sahai | |
| 2005 | Kyon Ki | Dr. Tanvi Khurana | |
| 2005 | Dosti: Friends Forever | Anjali | |
| 2006 | 36 China Town | Priya | |
| 2006 | Chup Chup Ke | Shruti | |
| 2006 | Omkara | Dolly Mishra | Filmfare Critics Award for Best Actress Nominated—Filmfare Award for Best Actress |
| 2006 | Don: The Chase Begins Again | Kamini | Cameo |
| 2007 | Kya Love Story Hai | Herself | Special appearance in song "It's Rocking" |
| 2007 | Jab We Met | Geet Dhillon | Filmfare Award for Best Actress |
| 2008 | Halla Bol | Herself | Special appearance |
| 2008 | Tashan | Pooja Singh | |
| 2008 | Roadside Romeo | Laila | Voice |
| 2008 | Golmaal Returns | Ekta | |
| 2009 | Luck by Chance | Herself | Special appearance |
| 2009 | Billu | Herself | Special appearance in song "Marjaani" |
| 2009 | Kambakkht Ishq | Simrita Rai | |
| 2009 | Main Aurr Mrs Khanna | Raina Khanna | |
| 2009 | Kurbaan | Avantika Ahuja / Khan | Nominated—Filmfare Award for Best Actress |
| 2009 | 3 Idiots | Pia Sahastrabudhhe | Nominated—Filmfare Award for Best Actress |
| 2010 | Milenge Milenge | Priya Malhotra | |
| 2010 | We Are Family | Shreya Arora | Filmfare Award for Best Supporting Actress |
| 2010 | Golmaal 3 | Daboo | Nominated—Filmfare Award for Best Actress |
| 2011 | Bodyguard | Divya | |
| 2011 | Ra.One | Sonia Subramaniam | |
| 2012 | Ek Main Aur Ekk Tu | Riana Braganza | |
| 2012 | Agent Vinod | Dr. Iram Parveen Bilal | |
| 2012 | Heroine | Mahi Arora | Filming (Releasing on September 14, 2012) |
| 2012 | Talaash | Post-production (Releasing on November 30, 2012) |
