Social cognitive career theory (SCCT) recognises the importance of individual differences and contextual influences in the career decision-making process. In extending the SCCT choice model, this study tested the role of personality, social supports, and the SCCT variables of self-efficacy, outcome expectations and goals in explaining the career readiness actions of career planning and exploration. The authors surveyed 414 Australian high school students in Years 10, 11 and 12. Career exploration was associated with goals and social supports, whereas career planning was associated with self-efficacy, goals, personality and an interaction term for goals and social support that indicated that levels of planning were highest when social support and goals were highest. Implications for parents, teachers and guidance counsellors as well as recommendations for future research directions are discussed. (Contains 2 figures and 3 tables.)