Copolymerization of methyl methacrylate(MMA) and alkyl acrylates [t-butyl(tBA) and 2-ethylhexyl(OA)] was realized from a short living pre-PMMA. The poly(MMA-co-tBA) and poly(MMA-co-OA) obtained with rac-Me(2)Si(Ind)(2)ZrMe(2) were characterized as random isotactic copolymers. Whereas, corresponding syndio-rich atactic random copolymers were obtained with CP(2)ZrMe(2).