Alia Bhatt, Varun Dhawan attend song launch of 'Kalank'

Actor Alia Bhatt and Varun Dhawan attended the song launch of their upcoming film 'Kalank' in Mumbai. The song 'first class' was well received by the audience. This period drama is set in 1940s. Dhawan and Bhatt also grooved to the song. The film is set to release on April 17.