Amido-pyridine ligands are attractive due to the easy access to the protonated amino counterpart (pro-ligand: ZH) through a simple condensation reaction of a suitable amine on the pyridyl ketone, followed by a reduction reaction of the imine group.[1] These ligands offer the possibility to be modified at various sites, such as the substituent on the pyridine ring, the group on the carbon in the -position of the amine, and the substituent carried by the amine nitrogen, allowing for a rich variation of coordination and electronic/steric properties of the resulting metal complex. In recent years, the coordination chemistry of borohydride and allyl groups in rare-earth complexes of the type [RE]-(BH4)[2] or [RE]-(C3H5)[3] has received significant interest and has been recognized as offering high potential for various catalytic transformations. In this study, a new family of rare-earth metal borohydride and allyl complexes supported by amido-pyridine ligands was developed in our research group (Fig.1). These complexes were found to be very versatile in terms of coordination mode with neodymium (and also yttrium), producing complexes with good abilities for the ring-opening polymerization of cyclic esters.