While digital technologies offer numerous conveniences, their unconscious and excessive use— especially during adolescence—can lead to physiological and psychological problems. Digital addiction tends to become more pronounced during this critical developmental stage and may result in longterm, potentially irreversible consequences. Although there is evidence to indicate that positive family environments may be a significant protective factor in reducing digital addiction among adolescents, research in this area is still in its early stages. Poor family relationships may cause adolescents to spend more time alone and engage with digital devices. This can lead to increase while-in-bed-smartphoneuse-induced sleep procrastination (WSPS), which may contribute to the development of digital addiction. Building on previous literature, the present study explores whether WSPS mediates the relationship between family interaction patterns (i.e. daily conversation and joint activity times) and digital addiction among adolescents. The present study was performed with 235 adolescents (Mage = 16.08, SD = .92, range = 15–19) from the Eastern Black Sea region of Türkiye. Results revealed that both daily conversation time and joint activity times within the family were negatively correlated with digital addiction. Furthermore, WSPS fully mediated the models between daily family interaction (daily conversation and joint activity time) and digital addiction. The findings are discussed, and practical implications are provided.