摘要:Writing is the foundation of real formal task which allows writers to engage in real communication outside the classroom. Thus, formal letter writing is a range whereby learners get engaged in a wide range of writing tasks not limited to corrective facts but also the language used outside of the classroom. This study emphasises on the use of interdiscursivity through learners’ group discussion when writing a formal letter. A qualitative method was employed in this study whereby the participants’ discussions on the process of formal letter writing were recorded. The recordings were then transcribed and analysed. The transcriptions revealed how interdiscursivity could be used as an efficient strategy for formal letter writing. The findings of this study can aid academicians in devising instructional strategies and materials for the teaching of writing formal letter writing. This study implicates that interdiscusivity has a role in learner’s discussion when writing a formal letter.