This study investigates the lexical demand of animation films in an effort to determine whether animation films constitute an effective L2 resource for incidental vocabulary learning. The results of the study show that knowledge of basic vocabulary―corresponding to either Oxford 3000 or the list of words recommended for primary and secondary students by the Korean Ministry of Education, Science and Technology―plus proper nouns and marginal words provides 93% coverage of animation films, which is argued to be sufficient for adequate comprehension thanks to the strong visual imagery in animation films. The study further suggests that watching animation films can lead to significant vocabulary learning; it is argued that with the help of visual imagery, new words may be learned with as few as five or six encounters in the case of animation films. (Dongduk Women`s University, Chungnam National University)