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This study used a latent growth curve modeling approach to examine body image satisfaction in 1132 Norwegian adolescent and adult males and females measured at six times between ages 13 and 30. An additional model examined the long term influence of parent–child relationship, peer relationship (both relationships assessed at age 13), and BMI (measured at each interval) to the patterns of change. The results showed a linear growth in body image satisfaction through adolescence followed by a stabilizing of the latent curve in adulthood for both genders. There were gender and developmental variations in the relative contributions of parents and peers for the slope and quadratic growth and in the contribution of BMI to body image satisfaction. When controlling for BMI, initial parent–child relationships and peer relationship predicted the variance in slope growth for males. Parent–child relationship predicted …