Aamir Khan is set to make a significant impact once again with his upcoming movie Sitaare Zameen Par. Following the tremendous success of his 2007 release Taare Zameen Par, which shed light on dyslexia, Khan is reportedly shifting his focus to another important cause: Down syndrome. Moreover, Sitaare Zameen Par marks the debut collaboration between Aamir Khan and Genelia Deshmukh.