Herein we report the synthesis and characterization of dinuclear magnesium-hydride complexes, [(IiPrMe2)Mg(μ-H)(HMDS)]2 [4, IiPrMe2 = N,N'-diisopropyl-2,3-dimethylimidazol-2-ylidine, HMDS = bis(trimethylsilyl)amide] and [(IiPrMe2)Mg(μ-H)(ASCP)]2 (5, ASCP = 2,2,5,5-tetramethyl-2,5-disila-1-azacyclopent-1-yl). Compounds 4 and 5 exhibit the lowest nuclearity of any carbene-magnesium hydride complex to date.