Both students' language learning and teachers' language teaching are interconnected components of the language-learning process, and they rely on each other to create an effective language-learning environment. This research article investigates the teachers’ roles in language teaching to promote the students’ learner-centered language learning. The method applied in this paper was a library research study where theories were summarized and synthesized from academic sources to provide the answers to the research problems. The instruments used in this study were journal articles, conference proceedings, books, and book sections in the field of language teaching and learning. The results indicated that English teachers, assuming diverse roles including controllers, assessors, managers, and facilitators, collectively contribute to shaping a dynamic and student-focused language learning environment, fostering autonomy, motivation, and self-directed learning throughout students' language acquisition journey. The findings can enhance the quality of teachers’ teaching process by prioritizing students’ needs, interests, and life-long learning.