This paper provides an overview of the Workshop on Affective Computing for Mental Wellbeing (mWELL) hosted at the 11th International Conference on Affective Computing and Intelligent Interaction (ACII) in 2023. The workshop aims to bring together researchers, practitioners, and experts from multiple disciplines, to explore how affective computing can contribute to addressing mental health challenges and promoting mental wellbeing, identify key challenges and solutions, and find the most appropriate ways to move the field forward. The paper highlights the workshop’s motivation, objectives, and the contributions made by the participants.