The authors investigated links between the Big Five, proactive personality, and motivation to learn. Web-based survey data were collected at 2 points in time from 183 employees of a financial services firm. Results showed that proactive personality was, only in part, a composite of Big Five facets, which accounted for 26% of its variance. Structural equation modeling results demonstrated that proactive personality, openness, extraversion, and conscientiousness predicted motivation to learn. In addition, motivation to learn was positively related to objectively assessed development activity. Proactive personality, extraversion, and openness had significant indirect links to development activity. Hierarchical regression results suggested that proactive personality had significant incremental validity in the prediction of motivation to learn over all relevant Big Five facets.Keywords: proactive personality, motivation to learn, five factor model of personality, development activityOngoing changes in the nature of employment relationships and improvements in the use of technology for training have led to two emerging trends in today's work organizations, both of which point to an increasing emphasis on individual responsibility for learning and development. First, changes in the nature of the psychological contract along with increasing emphasis on protean careers, boundaryless careers, and career self-management characterize individual employees as free agents who must be proactive in seeking out and participating in training and development opportunities in order to maintain internal and external market-