This qualitative study focused on the influence of a World Englishes (WE) instruction to prospective English language teachers from a multitude of aspects, such as their awareness of the WE, their opinion on the WE instruction, and their intention to adopt WE-inclusive practices in their classes in the future. The participants comprised 27 student teachers of English. They were enrolled in an elective course titled "World Englishes and Culture", aiming at developing students' understanding and awareness of the WE and its possible role as part of the EFL practices. The data were gathered through self-reflection papers of all participants as well as semi-structured interviews with five of them. The analysis of the data revealed that the WE instruction had the participating student teachers raise awareness about and develop a positive attitude towards the WE-relevant issues and WE-inclusive EFL practices. The findings further illustrated that some students planned to use the WE-oriented practices in their future classes, while a majority of them believed that the course should become an obligatory component of the curriculum rather than an elective one.