Inclusion Criteria:

• * Married/cohabitating couple - both partners must be eligible
• * BMI between 25-55kg/m2
• * English speaking/reading
• * Have a smartphone and reliable internet access
• * Have active email address
• * Willing to videoconference

Exclusion Criteria:

• * Report being unable to walk 2 blocks without stopping
• * Are currently participating in weight loss treatment, have a history of bariatric surgery, or lost ≥5% in the past 6-months
• * Are pregnant or plan to become pregnant during the study period
• * Report chest pain or loss of consciousness on the Physical Activity Readiness Questionnaire
• * Report a medical condition that could jeopardize their safety in a weight control program with diet and exercise guidelines
• * Report conditions that, in the judgment of the PI, would render them unlikely to follow the protocol (e.g. dementia)