This study investigates the impact of sustainability-promoting influencers on social media on their followers' sustainable behaviors. The research focuses on understanding how influencer credibility (IC), perceived behavioral control (PBC), and attitudes towards sustainability (AS) affect actual sustainable behavior (SB) among followers. A survey was conducted with followers of sustainability influencers, and data were analyzed using Partial Least Squares Structural Equation Modeling (PLS-SEM) to test the proposed pathways between the constructs. Results indicate that influencer credibility positively influences followers' attitudes towards sustainability and directly impacts their sustainable behaviors. Additionally, perceived behavioral control was found to significantly affect both attitudes towards sustainability and actual sustainable behaviors, highlighting the importance of followers’ self-efficacy in adopting green practices. Attitudes towards sustainability also play a crucial role in mediating the relationship between influencer credibility and sustainable behaviors. The findings suggest that influencers who are perceived as credible and trustworthy can effectively drive positive attitudes and actions towards sustainability among their audiences.