People believe repeated statements more than new ones; a phenomenon called the repetition-induced truth effect. It is prominently explained with the subjective processing ease for repeated as compared to new information, termed fluency. To date, the role of affective processes for the truth effect is rather unclear. From a theoretical perspective, affect influences processing styles, may directly inform judgments, and fluent processing in itself is experienced as pleasant. In the present study, we tested whether a positive, neutral, or negative picture presented before a statement influences the repetition-induced truth effect. We expected an enhanced truth effect in the positive and a reduced truth effect in the negative condition. Thirty-five participants took part in two sessions that were a week apart. In session 1, they rated the truth status of 102 statements. These were repeated in session 2 and intermixed with 102 new statements, and again we collected participants’ truth ratings. Furthermore, each statement was preceded by an affective picture. While we replicated the repetition-induced truth effect, the interaction between affect and repetition was insignificant, but we observed a significant main effect of affect—statements were rated as truer after a positive rather than a negative or neutral picture, which may be due to misattribution of positive affect to the truth of the statements. In sum, our results suggest two mechanisms that enhance the subjective truth of statements: repetition and positive affect.