This study is a longitudinal mixed method design investigating Iranian English learners' perception of native-speaker English teachers (NSETS) and non-native-speaker English teachers (NNSETS) in New Zealand and Iran within the conceptual framework of Kumaravadivelu (2003), Rudolf (2018), and Benson el al. (2013). A semi-structured interview and a questionnaire (consisting of 21 Likert items and 3 open-ended questions) were used twice ten months apart in each context. An online narrative interview was employed in 2022 to supplement the data. Non-parametric data analyses were run on the Likert items. Several coding schemes were developed and a thematic analysis was employed. Findings revealed that NNSETS in New Zealand and NSETS in Iran were perceived by the learners as more effective in guiding their students toward developing a multilingual identity. This is interpreted as the "cross-actional influence of context in language learners' perception of teachers regarding L2 identity development in students" in this research. The findings also showed a shift in students' perception from NSETS to NNSETS in both contexts over time due to the better instructional strategies of NNSETS for teaching reading, listening, grammar, and their deeper understanding of the student's needs. This study informs language teachers, teacher educators, and education authorities on 1) the cross-actional influence of context on students' perception of teachers regarding L2 identity development as a normal procedure, 2) the pattern of a shift from NSETS to NNSETS due to the qualifications of NNSETS should be considered in teacher training programs to make the most proficient language teachers accordingly.
