This article analyzes mismatches between syntactic and prosodic 
constituency in Irish and attempts to understand those mismatches in 
terms of recent proposals about the nature of the syntax-prosody 
interface. It argues in particular that such mismatches are best 
understood in terms of Selkirk’s (2011) Match Theory, working in 
concert with constraints concerned with rhythm and phonological balance. 
An apparently anomalous rightward movement that seems to target certain 
pronouns and shift them rightward is shown to be fundamentally a 
phonological process: a prosodic response to a prosodic dilemma. The 
article thereby adds to a growing body of evidence for the role of 
phonological factors in shaping constituent order.