Ahsan debuted her film career as a guest artiste in the film "Bachelor (2004)", directed by Mostofa Sarwar Farooki. As the lead actress, she debuted in Nasiruddin Yousuff's film "Guerrilla" (2011)). Adapted from the novel "Nishiddho Loban" by Syed Shamsul Huq, the film was based on the events of the Bangladesh Liberation War. It narrates the tale of Bilkis Banu, played by Ahsan, a freedom fighter, who actively participates in the Liberation War while searching for her lost husband. The film won National Film Awards in ten categories, including the Best Actress Award for Ahsan.