Incidental learning is a well-known process of acquiring new knowledge, vocabulary, or information without intention. Traditional or intentional learning is widely practiced in classroom environments, while incidental one receives less attention from educators, schools, and scholars. English Language Learners encounter various problems when they start learning the second language, including culture shock, lack of understanding of foreign culture, different contexts, and ineffective teaching strategies implemented by teachers. Many English Language Learners cannot communicate in a second language outside the classroom, yet, they are exposed to a variety of media, including cartoons and animated films, when they are at home. By using cartoons as the means of incidental learning among English Language Learners to acquire second language vocabulary, students could learn a foreign language faster. The current paper critically analyzes the benefits of incidental learning, the evidence of its effective implementation in the classroom with English Language Learners, and the results of previous studies using cartoons as the method of incidental learning among students, including English Language Learners. The paper recommends using incidental learning as one of the strategies to acquire second language vocabulary among English Language Learners. However, teachers must pair this practice with intentional learning to retain the results. Also, it is recommended to use cartoons with subtitles for students with basic or limited knowledge of a second language for effective accommodation and scaffolding of English Language Learners in general classrooms.