As the quality of life improves, an ageing population is the outcome. This group of society is also a low adopting and use group of Online Social Networks that are proliferating daily lives. Therefore, this research in progress paper formed the aim: To identify, understand and explain the adoption, use and diffusion of OSN within the older adult population residing in Hertfordshire households of the UK. This paper provides the theoretical foundations and hypothesis of this study. It also explains how it will provide contributions for academia, policy makers and industrial sectors and offers a conclusion to this paper.