Professor Helen Christensen is widely regarded as a world leader in the field of digital mental health interventions. She pioneered many of the processes and strategies that are used internationally today. Trained as a clinical psychologist, she led the translation of traditional face-to-face psychological treatment to digital delivery. Through over 50 trials and cohort studies, Professor Christensen demonstrated the effectiveness of digital interventions. Relatedly, she has pioneered the science of digital phenotyping by which passive data collection (from smartphones) can monitor a person’s mental health. Overall, her digital developments have been used by millions of people globally, meaning that Professor Christensen has had an enormous global impact on mental health.