Ruth Evans explores the under-recognised but striking use of rhyme-breaking in Chaucer’s poetry, present in the Canterbury Tales, the Book of the Duchess, the Legend of Good Women and Troilus and Criseyde. Evans draws upon a recent resurgence of critical interest in the politics of form to argue that Chaucerian rhyme-breaking warrants closer attention not only for its ironic effect, but also for its potential to illuminate Chaucer’s position within the multilingual context of late-medieval England.