Vocabulary mastery is a basic skill that is needed by students in learning English. In English Education Department (EED) of Universitas Muhammadiyah Yogyakarta, vocabulary is just integrated in courses, thus students need to be creative to improve their vocabulary. The objectives of the research are to know the advantages and challenges of learning vocabulary through watching English movies at the English Education Department, Universitas Muhammadiyah Yogyakarta from the students’ perspective. This research employed a qualitative research design. To answer the research questions, the researcher conducted interviews to six participants of batch 2013 of EED UMY and then the researcher analyzed the data. The findings of this research showed that watching English movie could increase students’ vocabulary. The reason why their vocabulary increases are knowing formal and informal words, learning slang words, knowing how to use vocabulary based on the context, knowing how to pronounce english words well, knowing antonym and synonym of words, knowing how to use idioms, increasing the mastery of technical terms, giving exposure, knowing the spelling of English words, and knowing the meaning of word from the visual. Related to the challenges on learning vocabulary through watching English movie, they include: different pronunciation of certain words are hard to deal with. In addition, difficulties in keeping up with the speed of the conversation and undesrtanding the coarse language become the challenges too