The purpose of this study was to explore how sport and exercise psychologists working in sport understand and use motivational interviewing (MI). Eleven practitioners participated in semistructured interviews, and inductive thematic analysis identified themes linked to explicit use of MI, such as building engagement and exploring ambivalence to change; the value of MI, such as enhancing the relationship, rolling with resistance and integrating with other approaches; and barriers to the implementation of MI in sport psychology, such as a limited evidence-base in sport. Findings also indicated considerable implicit use of MI by participants, including taking an athlete-centered approach, supporting athlete autonomy, reflective listening, demonstrating accurate empathy, and taking a nonprescriptive, guiding role. This counseling style appears to have several tenets to enhance current practice in sport psychology, not least the enhancement of therapeutic alliance.