Mona Singh has joined the ranks of other TV actors making their filmi debut. The actress recently shot for Raju Hirani's 3 Idiots where she plays Kareena Kapoor's sister. Mona says, "I couldn't have asked for a better launch. I was doing a show in 2007 in New York where I met Raju for the first time. He mentioned that he was writing a script with a role keeping me in mind. Exactly a year later, I got a call that I was cast in 3 Idiots." The actress was initially supposed to make her l