Poonam was born to Beep Singh and Kharain Kaur, she did her schooling in Hyderabad Public School, before doing fashion designing at the National Institute of Fashion Technology (NIFT) in Delhi. In 2006, after her studies, she signed up for a film to be directed by Teja, which didn't take off for unknown reason. However, she took an offer for another Teja film, Oka Vichitram. Even before the release of that film, Kaur was pursuing a lead role in another Telugu film, Mayajalam, which released first. Officially, it was the debut movie for her. Subsequently, she appeared in several Telugu films as Nikki and Neeraj, enacting the title role of Nikki and in Souryam, alongside Gopichand and Anushka Shetty. For her performance in the latter, Kaur received a nomination for the Best Supporting Actress Award for 2008. She made her acting debut in the Tamil and Kannada film industries, with S. A. Chandrasekhar's Nenjirukkum Varai and Bandhu Balaga, respectively. In 2010, she made a comeback in Tamil with the highly anticipated Unnaipol Oruvan, a remake of the 2008 Bollywood film, A Wednesday!, in which she played a small supporting role alongside legendary actors Kamal Haasan and Mohan Lal.Recently she has been nominated as a brand ambassador for Miss Telangana Event. Her upcoming movies are Attack, Vettai Mannan, Manjina Hani, Antha Nee Mayalone, Super Star Kidnap, Guest, Vatham, Ranam.