David Seltzer (born February 12, 1940) is an American screenwriter, producer and director, perhaps best known for writing the screenplays for The Omen (1976)[1] and Bird on a Wire (1990).

[3] He was uncredited for his contributions to the screenplay of the 1971 musical film Willy Wonka & the Chocolate Factory.

The author of the original book, Roald Dahl, is credited as the sole screenwriter; however, it has been revealed that Seltzer rewrote 30 percent of Dahl's script, adding such elements as the "Slugworth subplot", music other than the original Oompa Loompa compositions (including Pure Imagination and The Candy Man), and the ending dialogue for the film.

[4] Seltzer's writing credits include the screenplays for The Omen, Prophecy, Six Weeks, My Giant, Dragonfly and Bird on a Wire, starring Mel Gibson and Goldie Hawn.

In 2002, Seltzer was reported to be writing a UK remake of Alfred Hitchcock's Strangers on a Train, from the novel by Patricia Highsmith.