Inelastic Brillouin light scattering from semicrystalline polypropylene films reveals the presence of up to four bulk and surface phonons. The coexistence of amorphous and crystalline regions in the micrometer range allows for the propagation of two longitudinal acoustic excitations and one transverse acoustic excitation. The surface Rayleigh wave proceeds with a phase velocity intermediate between the two longitudinal counterparts, indicating surface inhomogeneities. The intensity and the frequency of the observed phonons relate to the fraction of sizable (> 0.2 mu m) spherulites and provide a nondestructive microrheological characterization of the film. The relation of the acoustic excitations to the surface and bulk morphology of the semicristalline films is supported by the X-ray patterns and AFM images.