Over 70 years of chemical investigations have shown that,plutonium exhibits some of the most complicated chemistry in the periodic table. Six Pu oxidation states have been unambiguously confirmed (0 and +3 to +7), and four different oxidation states can exist simultaneously in solution. We report a new formal oxidation state for plutonium, namely Pu2+ in [K(2.2.2-cryptand)][(PuCp3)-Cp-II ''], Cp '' = C5H3(SiMe3)(2). The synthetic precursor (PuCp3)-Cp-III '' is also reported, comprising the first structural characterization of a Pu-C bond. Absorption spectroscopy and DFT calculations indicate that the Pu2+ ion has predominantly a 5f(6) electron configuration with some 6d mixing.