Background: People with an acquired brain injury (ABI) find it challenging to use social media due to changes in their cognition and communication skills. Using social media can provide opportunities for positive connection, but there is a lack of interventions specifically designed to support safe and successful social media use after ABI. Aims: To investigate the outcomes of completing a social media skills intervention and identify barriers and facilitators for future implementation. Methods & Procedures: The study used a mixed-methods, pre-post-intervention design. A total of 17 adults with an ABI were recruited. Participants completed an intervention that included a short self-guided course about social media skills (social-ABI-lity course), and then participated in a private, moderated Facebook group over a 12-week period (social-ABI-lity Facebook group). Data were collected over this period through observation of group activity and weekly surveys. They were also collected on social media use and quality of life at pre-intervention, post-intervention and after 3 months. Participants provided feedback on the experience of participating in the programme via a post-intervention interview. Outcomes & Results: At post-intervention, there were significant improvements in confidence in using Facebook (p = 0.002) and enjoyment of using Facebook to connect with others (p = 0.013). There was no significant change in reported quality of life, although participants described the multiple benefits of connection they perceived from involvement in the group. Observational data and feedback interviews were informative about the feasibility and acceptability of the intervention. Conclusions & Implications: This pilot study provided preliminary evidence that an intervention comprising a short, self-guided training course and a private, moderated Facebook group improved outcomes for people with ABI. Key recommendations for future implementation include embedding active peer moderators within groups and taking an individualized approach to delivery of the intervention.