film, Sen asked his father to fix a meeting with him. His first meeting with Gowariker was a casual one at his office, it was where he told him that he would like to make him listen to some of his compositions. Gowariker immediately agreed to visit his studio the next morning. The next day, when he went to Sen's studio and heard some of his tunes, he really liked what he heard and after a couple of weeks later, Gowariker called up Sen and said "You are on for this project". For Sen, it was a dream come true. At first Sen was thrilled of getting the offer, but when he was told that there would be 13 songs in the movie, one song for each of the 12 zodiac signs and then one song in which the lead protagonist makes the final choice, he was taken aback, since nowadays its quite rare to hear 13 different songs in one album and that itself was a difficult task, and again, it was an equally difficult task to create 13 distinct songs, each for one particular zodiac sign and then incorporating the flavor of all these 12 songs into that final song, was the most toughest task, however he took it up as a challenge and started working on the music, which took more than one and a half years in the making. The soundtrack of the film, was released in August 2009 and irrespective of the box office status of the film, it has been able to garner mostly positive critical responses. Bollywood Hungama quoted the album as "interestingly done" and "an experience not to be missed". BBC Music praised Sen's work and quoted him as "Sen shows he can successfully compete with the best in Bollywood". Besides composing the soundtrack and the film score, Sen even sang most of the songs in the film. In 2010, director Ashutosh Gowariker roped him again, for his period piece film Khelein Hum Jee Jaan Sey, based on the Chittagong Uprising of 1930. The soundtrack of which met with positive critical responses. In 2011, he has had a major release with a top banner Yash Raj Films – Mere Brother Ki Dulhan, the music of which got appreciation from both critics and masses. The songs "Dhunki", "Isq Risk" and title track were chartbusters. In 2012, he replaced Pritam as the music director