The future generation's competency in the English language is highly dependent on the performance of our very own TESL students as they are the future English language teachers who can make all the differences. Hence, any issues that might jeopardise their performance can never be taken lightly. This research was carried out to investigate whether TESL students' addiction to social networking sites (SNSs) influences their academic performance. A survey questionnaire method was used to gather data from 93 Semester 8 TESL students from the Faculty of Education, UiTM Shah Alam. The SPSS version 16.0 was used to analyse data. Despite initial prediction that student addiction towards SNSs is related to their academic performance, this study found no significant relationship between the two aforementioned variables. The finding contradicts several other studies on the relationship between SNSs addiction and academic achievement.