This study sought to investigate (1) the perceived social self-efficacy (PSSE) levels of undergraduate English teacher candidates in Turkey, (2) the foreign language anxiety (FLA) levels of them, (3) the relationship between teacher candidates' PSSE and their FLA, (4) the effect of teacher candidates' gender and age on their FLA and PSSE, and finally (5) the link between PSSE and FLA of teacher candidates moderated by age. Results indicated that a huge number of the participants lacked high PSSE as measured by the applied criterion. As in the case of PSSE, the majority of the undergraduate English teacher candidates in Turkey stated they had medium self-efficacy. However, in terms of the results on participants with high and low levels of PSSE and FLA, the data show a negative correlation; that is, the number of participants with a high PSSE was close to the number of participants with a low FLA, and the number of participants with a low PSSE was close to the number of participants with a high FLA. These findings suggest that an increase in PSSE would result in a decrease in FLA. Finally, all relevant information (i.e. R-squared, F, and P values) support the premise that age positively moderates PSSE, meaning that as the participants' age increases, their PSSE goes up too. We can also infer that increased age can result in a decline in FLA.