This study aims to discover the lexico-grammatical features and social function of Ria Ricis and Atta Halilintar's, promotional captions on Instagram. The frameworks used to guide this research included Gerot and Wignell's explanations about the lexico-grammatical features and social function of the descriptive, procedure, and recount text (1995) and Halliday's transitivity analysis (2014). The study used a qualitative method. The results show that promotional captions could consist of descriptive, procedure, and recount texts with different lexicogrammatical features and social functions for each text type. Relational Processes dominate descriptive texts, while Material Processes appear frequently in procedure texts. In terms of recount texts, Ria Ricis' recount texts are dominated by Material Processes while Atta Halilintar's recount texts contain Material Processes, Mental Processes, and Behavioral Processes. The social function of the promotional caption is to sell products and services online. However, each text type has a different social function. In promotional captions, procedure texts are used to give the readers instructions on how to buy or get more information about the products. Meanwhile, recount texts are used to tell the readers about the Ria Ricis and Atta Halilintar's past experiences which are related to the products. Lastly, descriptive texts are used to give details about the products.