This document puts forward the joint position and vision of an expert, global, multistakeholder working group on implementing Kangaroo Mother Care (KMC) for all preterm or low birth weight (LBW) infants as the foundation for small and/or sick newborn care within maternal, newborn, and child health programmes, and spur collaborative global action. The document summarizes the background information, evidence, and rationale for making KMC available to every preterm or LBW newborn and seeks to galvanize the international maternal, newborn, and child health community and families to come together to support the implementation of KMC for all preterm or LBW infants to improve their and their mothers and families health and well-being. This position paper is intended to be used by policy-makers (i.e. those responsible for national policy, guideline development and budget allocation), development partners, programme managers, health workforce leadership, practising clinicians, civil society leadership (e.g. parent and professional organizations) and researchers/research organizations involved in KMC implementation research.