As a result of the widespread belief that the personal and psychological characteristics of students have a significant impact on their level of academic engagement, a great number of studies have been carried out to investigate the role that students’ characteristics play in determining their level of academic engagement. However, in the context of studying English as a foreign language, the significance that classroom fun plays in academic motivation is largely ignored. As a result, the purpose of this study was to investigate the impact that EFL students’ level of enjoyment in the classroom had on their level of academic motivation. This study involved the participation of 323 students from secondary schools in Karachi. Quantitative research methods were used. The findings indicated that classroom enjoyment plays a significant role in enhancing students’ academic motivation. Regarding sub-domains of motivation, students’ intrinsic motivation was strongly influenced by classroom enjoyment, whereas students’ extrinsic motivation was the least influenced variable. The findings further followed by the discussion, implications and the constraints of the study.