This article argues that the Virgilian narrator’s account of Juno’s anger at the outcome of the Judgement of Paris at Aen. 1.25–7 contains an allusion, which seems to have gone unnoticed, to a prologue transmitted in some manuscripts of the Rhesus attributed to Euripides. It also discusses the problem of the origin of this prologue. Finally, it suggests some interpretative possibilities arising from recognition of the allusion.