AbstractAimsChildren and young people (CYP) with type 1 diabetes (T1D) are at increased risk of disordered eating. This study aimed to determine the feasibility and acceptability of a novel, theoretically informed, two‐session psychoeducational intervention for parents to prevent disordered eating in CYP with T1D.MethodsParents of CYP aged 11–14 years with T1D were randomly allocated to the intervention or wait‐list control group. Self‐reported measures including the Diabetes Eating Problem Survey—Revised (DEPS‐R), Problem Areas in Diabetes Parent Revised (PAID‐PR), Child Eating Behaviour Questionnaire subscales (CEBQ), Warwick Edinburgh Mental Wellbeing Scale (WEMWBS), clinical outcomes (e.g. HbA1c, BMI, medication and healthcare utilisation) and process variables, were collected at baseline, 1‐and 3‐month assessments. Acceptability data were collected from intervention participants via questionnaire.ResultsEighty‐nine parents were recruited, which exceeded recruitment targets, with high intervention engagement and acceptability (<80% across domains). A signal of efficacy was observed across outcome measures with moderate improvements in the CEBQ subscale satiety responsiveness (d = 0.55, 95% CI 0.01, 1.08) and child's BMI (d = −0.56, 95% CI −1.09, 0.00) at 3 months compared with controls. Trends in the anticipated direction were also observed with reductions in disordered eating (DEPS‐R) and diabetes distress (PAID‐PR) and improvements in wellbeing (WEMWBS).ConclusionsThis is the first study to have co‐designed and evaluated a novel parenting intervention to prevent disordered eating in CYP with T1D. The intervention proved feasible and acceptable with encouraging effects. Preparatory work is required prior to definitive trial to ensure the most relevant primary outcome measure and ensure strategies for optimum outcome completion.