A person's personality is believed to have a significant effect on one's success. It raises questions related to the success of student achievement in lessons, especially in English at school. Is it also influenced by the personality of the students as well. To confirm this, research is needed to find out whether there is an effect of student personality, in this case the big 5 personality traits on students' scores in English lessons. This study uses a quantitative approach. The research data were obtained through questionnaires from 102 respondents who were in the class. The research was conducted at MTs NU Nurul Huda Grade VIII D, E, F. The results of the study found that the components of the Big 5 personality traits; Neuroticism, Extraversion, Openness, and Conscientiousness have a positive effect on students' English scores. However, the agreeableness component has not been proven to affect student scores in English subjects. Therefore, schools, teachers, and parents should play an active role in helping students to learn more optimally with varied personalities.