A (t Bu-DAC)Ir(COD)Cl complex (t Bu-DAC = 1,3-bis(N-tert-butyl)diamidocarbene, COD = 1,5-cyclooctadiene) reacts with titanocene(II) and zirconocene(II) sources to form heterobimetallic complexes by metallocene coordination at the remote oxalamide binding site. Structural and spectroscopic data reveal the formation of a doubly-reduced [ t Bu-DAC] 2ligand upon metallocene complexation. The metallocene-substituted complexes catalyze benzaldehyde hydrosilation at rates over an order of magnitude faster than those observed with the parent iridium complex.