Writing skill needs the effective teaching strategy. This paper reported the effectiveness of the audio visual media, in the form of movies, for writing daily activities. This study was conducted on the fourth semester students of Academic Year 2016/2017 English Studies Universitas Harapan Medan with the 40 sampled students. This research used a survey method, so that the sample taken by random purposive. The two classes had Writing Diary with Audio Visual media in the form of movies. Result of research with examination showed significant improvement of writing skill by using audio visual media in model of Writing Diary; 2) significant improvement of critical thinking by using audio visual media in model of Writing Diary achieved; 3) Movies improved the writing skill of students and good thinking ability.