The article explores, from an Indo-Iranian comparative perspective, the concept of 'royal splendour' and its role in myth, ritual and political discourse, in ancient Indian and Iranian texts. It argues that there are similarities both on the level of details (terminology, imagery, motifs) and on a broader level (ruler ideology), some of which likely go back to Proto-Indo-Iranian culture. The article relates the Avestan xvarenahto the Vedic sri- and varcas-, as well as their Avestan counterparts sri- and varecah-. It looks at how the Vedic/Avestan epithet apam. napat-/apam napat- is connected to the motif of aquatic and royal splendour. The Avestan concept of royal splendour, it is argued, also shares key characteristics with the late Vedic and early epic goddess Sri. As the fickle and mobile consort of successive kings, whom she approaches or abandons depending on their virtues, the epic Sri is reminiscent of xvarenah-.