In the title compound, C23H25N3, the dihedral angles between the planes of the benzene ring and the two substituent dimethylphenyl rings are 60.94 (7)° and 88.08 (7)°, and the dihedral angle between the planes of the two dimethylphenyl rings is 58.01 (7)°. In the crystal, weak C—H...N interactions exist between adjacent molecules. One of the dimethylphenyl rings has a small amount of π–π overlap with the phenyl ring of an adjacent molecule [centroid-to-centroid distance = 3.9631 (12) Å].