This chapter concentrates on themes particular to an art therapist providing supervision to a clinician of another field or discipline. Many licensing and accreditation bodies permit interdisciplinary supervision, meaning a supervisor may hold a master’s degree in a “related field” if they meet other minimum clinical practice requirements. The experience of interdisciplinary supervision pivots the norm, providing the art therapist with more power as the supervisor, whether contracted or on-site. This power shift may result in difficulty building trust and establishing value. Throughout this chapter, special attention is given to building the relationship, learning from your supervisee, and utilizing your art therapy skills. Methods for introducing arts-based supervision into the relationship are covered, along with approaches to educate the supervisor on the supervisee’s professional specialty. This chapter also includes a vignette from a non-art-therapist supervisee seeking supervision from an art therapist, options for finding an art therapy supervisor, and the benefits of multidisciplinary supervision groups. This chapter includes clinical supervision vignettes by the first author and a non-art-therapist supervisee, and arts- and writing-based practice prompts for supervisors and supervisees to increase interdisciplinary understanding.