The mechanical characterisation of individual cells is complex and dynamic. Nonetheless, great progress has been made in understanding how the dynamics of subcellular structures leads to cell shape and motility. Static tissues have also been well characterised. It is at the level of morphogenesis where the bridging of scales between individual cell dynamics and tissue dynamics is least understood. This workshop aims to (1) present a framework for understanding what is already known about cell-level and tissue-level mechanics, (2) identify gaps in our understanding of how cells interact mechanically in tissues in order to actuate morphogenesis, (3) propose new collaborations to increase our understanding of the cell-tissue emergent dynamics. We will bring together experts in development, microscopy, image analysis, biomechanics, and modeling.