The C2P2 donor set in the title compound, [Pt(C12H8)(C27H26P2)], defines a distorted planar coordination environment about the PtII atom with small deviations from planarity. The bidentate nature of the biphenyl dianionic ligand results in a C—Pt—C bond angle of 79.94 (16)° and a P—Pt—P bond angle of 93.40 (4)°. The average Pt—C bond length is 2.083 (3) Å [range 2.081 (4)–2.085 (4) Å]; the average Pt—P bond length is 2.308 (8) Å [range 2.3030 (11)–2.3136 (11) Å].