All participants will be randomly assigned to a 12-session group-based Mindfulness-Based Weight Control (MBWC) intervention or a Standard Behavioral Weight Control (SBWC) intervention. Participants assigned to the MBWC intervention will receive mindfulness curriculum informed by Mindfulness-Based Stress Reduction plus the standard behavioral weight control components. Group sessions will be approximately 60 minutes each week. Outside of group sessions, participants will be asked to engage in dietary self-monitoring (MBWC and SBWC groups) and practice mindfulness skills (MBWC only).

All participants will be randomly assigned to a 12-week group-based Mindfulness-Based Behavioral Weight Control (MBWC) intervention or a Standard Behavioral Weight Control (SBWC) intervention. Participants assigned to the SBWC intervention will receive the SBWC without mindfulness components. Each of the 12 group sessions will be approximately 60 minutes. Outside of group sessions, participants will be asked to practice dietary self-monitoring at home during the week.

Mindfulness-Based Weight Control will be administered over 12 group-based sessions with weekly home practice (e.g., mindfulness exercises, dietary self-monitoring, physical activity). All components of this telehealth intervention will be delivered via HIPAA-compliant videoconferencing software. Sessions will include BWC and mindfulness components. BWC components include: 1) a dietary plan based on a balanced, caloric deficit diet; 2) increasing physical activity; 3) behavioral components (e.g., self-monitoring, goal setting); and 4) minimal parent involvement (i.e., 3 parent sessions). Participants will be taught core mindfulness exercises (e.g., breath-awareness, body scan, mindful eating) while focusing attention on the present moment and non-judgmentally acknowledging thoughts, emotions, or sensations. Participants will learn informal mindful strategies for daily living, which are designed to increase awareness of emotions and their relation to emotional eating.

Objectively measured BMI/BMI z-score/BMI percentile for age and sex;

Emotional Eating Scale for Children (EES-C) total score, which is derived from an average of all 26 items (range = 0-4). Higher scores indicate higher levels of emotional eating.

Perceived Stress Scale (PSS) total score, which is derived from summing responses to all 10 items (range = 0-4 per item; 0-40 total). Higher scores indicate higher levels of stress.

Adolescent Stress Questionnaire (ASQ) total score, which is derived from summing responses to all 58 items (range = 1-5 per item; 58-290 total). Higher scores indicate higher levels of stress.

Chronic Stress Questionnaire for Children and Adolescents (CSQ-CA) total score, which is derived from summing responses to all 17 items (range = 1-4 per item; 17-68 total). Higher scores indicate more stress during the past 3 months.

Youth Eating Disorder Examination-Questionnaire (YEDE-Q) global score, which is derived by averaging the 4 subscales of the YEDE-Q (Restraint, Eating Concern, Shape Concern, and Weight Concern). The range for the total score is 0 to 6, with higher scores indicating more severe eating pathology.