Na Milegi Dobara. Akhtar had expressed her wish to work with Koechlin in a prior interview with NDTV, having seen her in Dev.D and the then-unreleased That Girl in Yellow Boots. She played the role of Natasha, a South Bombay girl who works as an interior designer. Koechlin, who took diction classes for the role which required her to speak accented Hindi, revealed that she was keen to do the film because her work in such projects as Dev.D and Shaitan had led her to being typecast in dark roles of prostitutes, troubled teenagers, and misfits. With the worldwide collections of , Zindagi Na Milegi Dobara was a blockbuster and became the ninth highest-grossing Bollywood film at the time of its release. Koechlin's performance was positively received by critics. Gaurav Malani of The Times of India deemed her "excellent", and Raja Sen in his review for Rediff.com noted her as "histrionically strong enough to manage varied roles". Koechlin also received her second Filmfare Award for Best Supporting Actress nomination for her performance in the film. Koechlin expanded her career into screenwriting with Anurag Kashyap's 2011 thriller That Girl in Yellow Boots. She said that Kashyap asked her to write the script for the film as he was looking for a woman's perspective for the story. Co-starring with Naseeruddin Shah, the film had her play a British woman name Ruth, who travels to Mumbai in search of her biological father. The role was partially based on her own experience as a 'white-girl' in India. Shot in a short duration of thirteen days, the film was screened at the 2010 Toronto International Film Festival and the 67th Venice International Film Festival, among other venues. It opened to critical acclaim, with Koechlin being widely praised for her performance. Giving the film three-and-a-half stars out of four, Roger Ebert wrote that Koechlin "creates a memorable woman who is sad and old beyond her years". Sukanya Verma of Rediff.com described Koechlin as "unrestrained and uncorrupted". NDTV film critic Saibal Chatterjee also lauded the film and deemed her performance as "absolute perfection". Koechlin's final release of the year was the Sanjay Leela Bhansali-produced comedy My Friend Pinto. She played the role of an aspiring dancer in the film. Koechlin was cast opposite Emraan Hashmi and Abhay Deol (her third collaboration with Deol) for Dibakar Banerjee's political-thriller Shanghai. The film, which was based on the Greek writer