Luxury brand marketers have recently turned their attention to luxury brand consumers and their social brand communities devoted to the brands. Luxury brands appeal to customers by enhancing their images regarding heritage, quality, and artistic value. Luxury fashion brands also establish social media communities to communicate their images more effectively. This study uses the key concepts of integration and interactivity to provide theoretical foundations to investigate luxury brand communities (LBCs) in the social media context. A survey was given to 252 members of Facebook fan pages for luxury brands from South Korea. This study examines effects of interaction as a process on perceived interactivity of LBCs in social media, and consequences, attitude, purchase intentions, and brand loyalties, hence offering implications for luxury brand management academics and practitioners