The ESC Working Group on Cellular Biology of the Heart aims to promote understanding of the importance of cell biology with respect to the heart. We bring together basic scientists and clinicians, with the aim of inspiring translational research in a variety of fields including coronary artery disease, cardiomyopathy, atrial fibrillation/arrhythmias, and heart failure. As such, we regularly interact with other ESC working groups, contributing our collective expertise on molecular and cellular mechanisms of cardiac health and disease. Our working group is keen to attract a diverse range of new members with an interest in learning about, discussing or promoting cellular biology of the heart.