Research on the imagined contact hypothesis suggests that simply imagining a positive interaction with an out-group member can reduce prejudice towards stigmatized social groups. To date, however, it remains unclear whether imagined contact has transient or long-lasting effects. This preregistered study (N = 153) tested the hypothesis that a single session of imagined contact is sufficient for reducing explicit and implicit prejudice towards a stigmatized social group and intergroup anxiety over several days. Highlighting the power of imagination, the results suggest that imagined contact could have long-lasting effects on explicit prejudice and intergroup anxiety.