The title mol-ecule, C35H25N3O, is a tri-phenyl-amine derivative with the 4-position substituted by an aldehyde group, and the 4'-position substituted by a 6-phenyl-2,2'-bi-pyridine group. The whole mol-ecule is non-planar and the dihedral angle between the core benzene and pyridine rings is 36.96 (5)°. The dihedral angle between the phenyl and benzaldehyde groups bonded to the amine N atom is 70.86 (5)°.