Two methods to introduce negative charges on a C-60 and the further use of these carbanions as initiators for anionic polymerization of styrene and methyl methacrylate were investigated. From the potassium salts of C-60, obtained by reduction with potassium naphthalenide, only the hexaanion is able to polymerize MMA, and that by electron transfer so that no fullerene is attached to the PMMA. In a second method, polystyryllithium was added to C-60 to form "living" star molecules with a C-60 core bearing a well-controlled number of branches (i.e., carbanions). Six carbanions have to be located on the C-60 to initiate anionic polymerization of styrene by addition onto the monomer, while five are enough to initiate the more reactive MMA. Stars with seven PS branches and heterostars with six PS and two PMMA have been produced.