Sweet William

Sweet William may refer to:


 * Dianthus barbatus, a species of flowering plant
 * Mustelus antarcticus, a species of shark
 * Sweet William (novel), a 1975 novel by Beryl Bainbridge
 * Sweet William (film), a 1980 British drama film, based on the novel
 * Sweet William (short story collection), a short story collection in the Just William series by Richmal Crompton
 * "Lord William" or "Sweet William", a traditional Scottish folk ballad