The authors adopted the 2 × 2 model of perfectionism to examine the unique and interactive effects of two dimensions of perfectionism (personal standards perfectionism [PSP] and evaluative concerns perfectionism [ECP]) on personal and interpersonal indicators of participant experience in youth sport (enjoyment, physical self-worth, and friendship quality). Participants (N = 219, M age = 15.12, SD = 2.02) were recruited from various school--and community-based sports and completed a multi-section questionnaire. Consideration of main and interaction effects indicated that pure PSP (high PSP/low ECP) was associated with the most positive sport experience and pure ECP (low PSP/high ECP) was associated with the least positive sport experience. The findings suggest that subtypes of perfectionism from the 2 × 2 model are predictive of differing experiences in youth sport participation.