In the title compound, C(19)H(15)N(3)O, the central pyrazole ring makes dihedral angles of 35.52 (12) and 62.21 (11)° with the attached phenyl and methyl-substituted phenyl rings, respectively. The corresponding angle between the phenyl and methyl-substituted phenyl rings is 62.90 (11)°. In the crystal, mol-ecules are connected by weak C-H⋯O hydrogen bonds, forming supra-molecular chains propagating along the a-axis direction.