This paper reports on a qualitative study that investigated the lived experiences of a group of pre-service English language teachers during a teaching practicum in Hong Kong. Multiple, in-depth interviews with student teachers were conducted during a 6-week practicum to understand the students' experiences of becoming teachers. A contribution of this study is to use the analytic lens of teacher identity to understand the challenges, one group of pre-service teachers confronted as they positioned themselves, and were positioned by others, as particular types of teachers during their practicum. The results of this study suggest that a critical perspective, grounded in an identity-theoretic understanding of pre-service teachers' practicum experiences, is needed to reveal and then overcome antagonistic relations that might threaten the identity work of trainee teachers. Endorsing calls to rethink the practicum, the types of support that might be offered to pre-service teachers are critically examined and suggestions for the ways in which stakeholders, such as teacher educators and school-based supporting teachers, can best facilitate the identity work of pre-service teachers undertaking a teaching practicum are offered. Implications for future research are also discussed.