The formation of ternary inclusion complexes of gamma-cyclodextrin (gamma-CD) with two different pairs of interacting monomers (4-vinylpyridine (4VP) with styrenesulfonate (SS), which can interact through attractive Coulombic interactions, and styrene (S) with 2,3,4,5,6-pentafluorostyrene (PFS), which interact through quadrupole interactions) is studied. Ternary inclusion complexes are formed for both monomer pairs, but 4VP and SS are included in the complexes in approximately the same ratio as is present in solution, whereas S and PFS are preferentially included as a pair. The influence of the ternary inclusion complexation on the copolymerization was studied. For the copolymerization of 4VP with SS no significant influence was found, whereas an enhanced tendency toward alternating copolymerization was found for the copolymerization of S and PFS in the presence of gamma-CD, which is ascribed to the preferential heteroinclusion of the monomers in the gamma-CD cavity.