Mixed polymeric micelles have been prepared from aqueous solutions of poly(2-(dimethylamino)ethyl methacrylate)-block-poly(glyceryl methacrylate), PDMAEMA(45)-b-PGMA(90), and poly(acrylic acid)-blockpoly(acrylamide), PAA(42)-b-PAAm(417), through complex coacervation of the oppositely charged blocks. Rather monodisperse, spherical aggregates are formed with a R-h = 15.2 +/- 0.4 nm. The extent of chain mixing between poly(acrylic acid) and poly(2-(dimethylamino) ethyl methacrylate) in the micellar core and poly(acrylamide) and poly(glyceryl methacrylate) in the micellar corona has been investigated by 2D H-1 NMR NOESY experiments. The presence of cross-peaks for protons in different core and corona blocks indicates that the two blocks are in close proximity (< 0.5 nm) and micelles are formed in which both core and corona are mixed.