A transformation to a Circular Economy (CE) must fundamentally start with the shift in the consumer behavior. While the circular economy is becoming increasingly popular from a policy and business perspective, consumer adoption is still inconsistent. Based on the COM-B framework (Capability, Opportunity, Motivation-Behavior), the study aims to explore the factors that motivate and influence circular participation and types of interventions that can be employed across the three domains of circularity: life-cycle extension, collaborative consumption, and recycling behavior. Drawing evidence from the scientific literature regarding consumer behavior, research and policy reports related to product stewardship, the focus here is on interventions that can influence consumer behavior towards circular practices. This thematic study explores the need to engage and transform consumer behavior in CE adoption, retention, and participation. Through analysis of selected cases, such as Patagonia's Worn Wear (USA), IKEA's Circular Hubs (EU), ShareWaste (Australia), and emerging models in the Global South, including SWaCH waste-cooperatives (India), with secondary data from academic literature, company reports, and other sources of data. The analysis reveals themes within each case study. Convenience and trust in the process appear to be determinants of initial adoption. Digital platforms, community-building are key to retaining consumers and socio-cultural alignment, economic incentives are crucial to sustained participation. Additionally, policy frameworks incorporating consumer education and institutional support are vital to normalizing circular behaviors. This Study makes an interdisciplinary contribution to the CE conversation by framing consumer behavior as a key lever of the circular transition, and provides strategic thinking for product developers, entrepreneurs, businesses, and policymakers interested in making a shift towards sustainable consumption.