 Ratajkowski leveraged her sudden prominence into supporting roles in major films . Ratajkowski played Andie Hardy , the mistress of Ben Affleck 's character , in David Fincher 's 2014 adaptation of Gillian Flynn 's novel Gone Girl . Affleck encouraged Fincher to consider Ratajkowski after seeing the " Blurred Lines " video . U @-@ T San Diego described Ratajkowski 's performance as " nuanced " , while Andrew O 'Hehir of Salon and Wesley Morris of Grantland wrote that her small role as a " duplicitous and manipulative former student " was critical . Reflecting on the performance in 2016 , Wolf described Ratajkowski 's portrayal as sympathetic and compassionate . 
