Kajal Aggarwal made her acting debut in ‘Kyun! Ho Gaya Na’ (2004). The film did average business at the box office. In 2007, she made her Telugu film debut with ‘Lakshmi Kalyanam’ which was also a mediocre success. That year, she also starred in the hit Telugu film ‘Chandamama’. The following year, she starred as ‘Deepti’ in the action-drama film ‘Pazhani’ directed by Perarasu. The film marked the Tamil debut of Kajal Aggarwal.
The year 2009 saw the release of S. S. Rajamouli-directed fantasy action film ‘Magadheera’ in which Kajal played the role of ‘Mithravindha Devi / Indira.’ The film became a massive box office success and went on to become one of the highest-grossing Telugu movies of all time.
Kajal Aggarwal went on to appear in box office hits such as ‘Brindavanam’ (2010), 'Naan Mahaan Alla' (2010), and ‘Mr. Perfect’ (2011). In 2011, she made her Bollywood comeback with the action film ‘Singham’ directed by Rohit Shetty. The film earned critical acclaim upon release and was a phenomenal success at the box office. In 2013, she starred as ‘Priya Chauhan’ in the heist film ‘Special 26.’ The movie made big numbers at the box office and was the 10th highest-grossing Bollywood film of the year.
Kajal Aggarwal was next seen in films like 'Yevadu' (2014), 'Govindudu Andarivadele' (2014), 'Temper' (2015), ‘Do Lafzon Ki Kahani’ (2016), 'Khaidi No. 150' (2017), 'Mersal' (2017), ‘Kavacham’ (2018), and ‘Ranarangam’ (2019). She was last seen in the 2021 thriller film ‘Mosagallu’ directed by Jeffrey Gee Chin. While the film received mixed reviews, the performance of Kajal Aggarwal was praised by critics. She will be next seen in the upcoming romantic comedy film ‘Hey Sinamika.’ She will also be seen in the vigilante action thriller film 'Indian 2,' directed by S.Shankar. The film is a sequel to the 1996 film ‘Indian.’