Objective: We developed and piloted a novel art-based online skills program led by a peer mental health professional with lived experience of complex mental health, including Borderline Personality Disorder (BPD). Key challenges of living with BPD and emotion dysregulation were addressed through artmaking informed by a dialectical framework and skills, to evaluate acceptability and efficacy. Method: A structured, manualised 2-hour weekly arts-based skills program was piloted for people with BPD over 18 weeks. Evaluation included both quantitative and qualitative measures at commencement and completion. Results: Thirty-eight participants enrolled in the program (89.5% identified she/her pronouns, average age 33.6 years), and 31 completed (82% retention). Multilevel modelling analysis of the primary outcome variable Difficulties in Emotion Regulation Scale (DERS) demonstrated a large improvement over time (effect size Cohen’s d = 1.77). Qualitative thematic analysis found participants