The growing air, water, and plastic pollution, wastage of food, deforestation, and chemical manufactured products have given rise to the concept of green marketing. Nowadays, consumers are more aware of their environment and health, and they look for eco-friendly products that are free of toxic materials. Many brands have looked into these issues. Keeping in mind the consumer’s desire, they have started manufacturing eco-friendly, free of toxic and recyclable products. This study aims to determine the antecedents that will affect the purchase decisions of Generations Y and Z consumers purchasing green products from the beauty and personal care industry, which can finally lead them to become brand loyal. An explanatory research design was carried out to develop an empirical result for the study. A self-administered questionnaire was elaborated. The responses were measured through a 5-point Likert scale. The questionnaires were distributed through online mode to the respondents. The sample for the study was selected through self-selection sampling. A total of 250 responses were analyzed. The data was analyzed through structural equation modeling with the help of the statistical tool Smart-PLS version 3.3.9. The study’s findings showed that green marketing mix, brand knowledge, and culture positively affect green purchase intention and finally lead to brand loyalty. The results also depicted that the reference group moderates between green purchase intention and brand loyalty. The overall understanding of green marketing and its impacts on the consumer’s purchase decisions, which leads to brand loyalty, would help the brands establish different marketing strategies for attracting and engaging the consumer with higher consumer retention. It would help the brands to create brand image, consumer satisfaction, and trust among the consumer towards the brand.