The objective of this double special issue on Facilitating Age Diversity in Organizations is to present new research that might help to facilitate age diversity in organizations, and to benefit rather than to suffer from the inevitable demographic changes. Part I of the special issue ("Facilitating Age Diversity in Organizations—Part I: Challenging popular misbeliefs about older workers"), focuses on the potential strengths of older workers that are often overlooked due to age-related biases and misbeliefs. It contributes to facilitating age diversity in organizations by critically reflecting and partly refuting negative pre-assumptions and stereotypes about older workers. The second part of the special issue ("Facilitating Age Diversity in Organizations—Part II: Managing Perceptions and Interactions"), concentrates on the difficulties and challenges that might arise during the interaction in age-diverse organizations. Exploring these difficulties based on rigorous scientific research not only leads to a better understanding, but also supports a more thorough development of tangible means and interventions that help to benefit from age diversity.