The current study was an attempt to investigate the effectiveness of the flipped classroom model on the fluency of foreign language learners' speech. To this end, fifty undergraduate English Language and Literature students, who had enrolled in a "Listening & Speaking" course, participated in this study. Data were collected through a one-group pre-posttest design and semi-structured interviews. Two raters assessed the learners' four oral presentations. The Praat software and one-way repeated measure ANOVA were used for data analysis. The results showed that the flipped classroom model could significantly develop students' oral fluency. Meanwhile, the findings of the semi-structured interviews indicated that the students were delighted with this approach. From their perspectives, the cooperation and collaboration between students and teachers were undeniable. They also believed that their self-confidence increased. Correspondingly, the results suggest that the language instructors and stakeholders at any level can benefit from this approach, i.e., flipped classroom model to shift the instruction to a practical learner-centered approach.
