Directed by Berry Gordy, Jr. as a vehicle for his star Diana Ross, Mahogany traces the life of a poor girl who makes it in the fashion world (first as a model, then designer) and deserts her boyfriend (Billy Dee Williams) in the meantime, hooking up instead with a photographer (Anthony Perkins). The song Do You Know When Youre Going To (Gerry Goffin/Michael Masser) was Oscar-nominated. ~ John Bush, All Movie Guide