Purpose: For this purpose, Teacher Self-Regulation Scale (TSRS), Emotions Questionnaire for Teachers (EQT) and Grasha's Teaching Style Inventory (TSI) were employed to gauge the influences of teacher self-regulation on university teachers' emotions and preferred teaching style. The participants of this study were 320 university teachers, majored in different branches of English (English Literature, English Teaching, English Translation), teaching in different universities of Iran. To shed light on the causal associations, a path analysis was run using LISREL 8.80. Design/methodology/approach: Following the pivotal role of effective teaching on educational well-being, the present study delve into three significant teacher-related variables i.e. teacher self-regulation, emotions and teaching style. For this purpose, TSRS, EQT, and Grasha's TSI were employed to gauge the influences of teacher self-regulation on university teachers' emotions and preferred teaching style. The participants of this study were 320 university teachers, majored in different branches of English (English Literature, English Teaching, English Translation), teaching in different universities of Iran. To shed light on the causal associations, a path analysis was run using LISREL 8.80. Findings: Based on the findings, teacher self-regulation predicts pleasant emotions positively; whereas, it predicts unpleasant emotions in a negative direction. The results also demonstrate that teacher self-regulation positively and significantly predicts student-centred styles (Facilitator and Delegator), and the reverse is true for teacher-centred styles (Formal Authority, Personal Model, and Expert). Research limitations/implications: Future studies may advance the possible relationships among the subscales of teacher self-regulation, teacher emotion and teaching style. Also, further investigations are suggested to target the teacher self-regulation, teacher emotion and teaching style in enhancing language learners' achievement. Practical implications: In effect, the findings of the current study contribute to the fields of teacher psychology and teacher education. The implications of this study may open another perspective into university teachers' psychological well-being and professional development. Social implications: The implications of this study may redound to the advantage of policy makers, curriculum designers, teacher educators, as well as university teachers. Originality/value: The implications of this study may redound to the advantage of policy-makers, curriculum designers, teacher educators and university teachers.