This article discusses and analyzes an unusual construction in Icelandic, with a plural pronoun in the singular reading and a directly juxtaposed or annexed NP (or DP), where, for example, 'við Ólafur' (literally “we.NOM Olaf.NOM”) means ‘Olaf and I’. We refer to this construction as Pro[NP]. Pro[NP] constructions have been reported for a handful of languages that lack a case system. Icelandic, in contrast, is a case language, and Pro[NP] in this language is 'case congruent': the pronoun and its NP/DP annex are always in the same case. No such language has to our knowledge ever been described in detail before; we provide the first in-depth investigation of case-congruent Pro[NP]. The article further compares the Icelandic construction to ap...