This study aimed to evaluate the effectiveness of a wellness programme for preservice teachers, "Promoting Educational Excellence through Resilience to Stress (PEERS)." The intervention group participants, who took part in the 4-week PEERS programme, and the comparison group participants were recruited online. A battery of self-report scales assessed various psychological constructs, including coping self-efficacy, resilience, mental health, well-being, mindfulness and self-compassion. Data were collected at three time points: before the intervention (T1), immediately after programme completion (T2) and 4 weeks after programme completion (T3). Results suggested that the intervention group participants reported significant improvements in coping self-efficacy, resilience and the nonjudging facet of mindfulness. High programme satisfaction was also reported, with 96% of the participants rating the overall programme as good or excellent. Therefore, the results demonstrate the effectiveness and positive impact of the PEERS programme on the resilience and coping efficacy of preservice teachers in Hong Kong.