The aim of this study was to evaluate the tripartite influence model of body image and disordered eating among 12–18-year-old girls (N = 900) living in Australia (n = 184), China (n = 293), India (n = 223), and Iran (n = 200). Participants completed measures about appearance pressures from family, peers, and media, thin-ideal internalization, appearance comparisons, appearance satisfaction, and disordered eating. Results indicated that media- pressures were most salient in Australia, whereas Iranians perceived family pressures to be the strongest. Indians felt the most pressure to look attractive from their family and peers, whereas Chinese felt similar levels of pressure from family, peers, and media. Path analyses suggested direct associations from one or more sociocultural factors to appearance satisfaction or disordered eating, with indirect paths via thin-ideal internalization and appearance comparisons emerging in all countries. Certain sociocultural factors contributed more strongly to the internalization of ideals and appearance comparisons within some countries. Multigroup path analyses demonstrated some cross-cultural variations in the strength of the pathways. Findings extend cross-cultural support for a modified tripartite influence model emphasizing culture-based specificities that can further guide preventative efforts to improve body image and eating attitudes among young girls in these four countries.