In the title mol-ecule, C(21)H(21)NO(2)S, the phenyl ring makes the dihedral angles of 74.13 (11) and 80.16 (11)° with the two benzene rings, which are inclined at an angle of 43.73 (10)° with respect to each other. In the crystal, mol-ecules are linked by inter-molecular C-H⋯O hydrogen bonds along the [010] direction. In addition, a weak C-H⋯π (arene) inter-action is observed.