This study examined the role of self-disclosure within protege/mentor dyads in formal mentoring partnerships within a corporate context as a means of learning more about specific relationship processes that may enhance the positive outcomes of mentoring. While both proteges and mentors self-disclosed in their relationships, proteges disclosed at a higher level than mentors. Protege self-disclosure, but not mentor self-disclosure, was related to protege outcomes including mentoring received, relationship satisfaction, and positive influence of mentoring. The study contributes to a mentoring literature that has become more interested in examining mentoring relationship micro-processes from both the protege and mentor perspective.