Supporting parent-child relationships is vital for children's social and emotional development, future health and well-being. As children now spend significant amounts of time attending early childhood education and care settings, it is opportune that interventions be designed for educators to promote and nurture parent-child relationships. The aim of the current paper was to describe the systematic development of the Educator-Parent-Child Relationship (E-PCR) programme using six steps of the Intervention Mapping protocol. The results of a needs assessment lead to development of the Building Educator Knowledge (BEK) framework, logic model and matrices for programme, performance and change objectives. Theory-based methods and practical strategies were identified to develop intervention materials at three socio-ecological levels: (i) individual, (ii) interpersonal and (iii) organizational. Future evaluations will assess the implementation and effectiveness of the E-PCR programme.