With the spread of English around the world and the recognition of English as a lingua franca (ELF), a large number of studies have investigated the attitudes of learners towards different varieties of English as well as their related accents. However, this attitude towards L1 accented English within the context of Iran has not been explored yet. Thus, the present study ecologically investigated the attitudes of Iranian English as Foreign Language (EFL) learners towards their L1-accented English based on Bronfenbrenner’s (1993) nested ecosystems model consisting of micro-, meso-, exo-, and macro- systems. To do this, a triangulation of data collection using an attitudinal questionnaire distributed among 157 respondents (118 female and 39 male) and semi- structured interviews with 60 participants (38 female and 22 male) were collected. The findings indicated a dominant emerging pattern of preference for native-like accent within the ecology of Iran along with the acknowledgement of L1 accented English. Maintaining linguistic security and self-confidence as well as teachers’ role and materials used within the microsystem of the class, learners’ background experiences within the mesosystem, policies of English language institutes at the exosystem, and the public view towards accent at the macrosystem contributed to the emerging pattern of preference for native-like accent within the context of Iran.