Building on Trait Activation Theory, this study explored whether, how, and why proactive personality and inclusive leaders can foster creativity at both individual and team levels. Using multi-wave data collected from hotel frontline employees and their supervisors, the study first found that at individual level, proactive personality could influence creativity via psychological safety, with inclusive leadership moderated the indirect relationship. The study further tested at team level, using lab experiment with hospitality majored students, the relationship between proactivity and creativity. The findings at the team level suggested that teams with highly proactive members exhibited higher levels of creativity than teams without highly proactive members. This research revealed the psychological mechanism of how proactivity contributes to individual creativity, and teams can benefit from having proactive members. • The study explored whether, how, and when proactive personality and inclusive leaders can foster team creativity. • The study employed a mix-method research design, examining individual level relationships and team level relationships. • At individual levle, psychological safety mediated the relationship between proactive personality and individual creativity. • At team level, teams with highly proactive members outperform teams without.