Question: Which American director directed the horror film "The Omen" in 1976, Richard Donner or William Keighley?

Context paragraphs:
Stars Over Broadway: Stars Over Broadway is a 1935 American musical film directed by William Keighley and written by Jerry Wald, Julius J. Epstein, & Pat C. Flick.  The film stars Pat O'Brien, Jane Froman, James Melton, Jean Muir, Frank McHugh and Eddie Conrad.  The film was released by Warner Bros. on November 23, 1935.

The Omen: The Omen is a 1976 British-American supernatural horror film directed by Richard Donner, and written by David Seltzer.  The film stars Gregory Peck, Lee Remick, David Warner, Harvey Spencer Stephens, Billie Whitelaw, Patrick Troughton, Martin Benson, and Leo McKern.  The first installment of "The Omen" franchise, "The Omen" concerns a young child replaced at birth by American Ambassador Robert Thorn unbeknownst to his wife, after their own son is stillborn.  They are surrounded by mysterious and ominous deaths, unaware that the child, Damien, is the Antichrist.

William Keighley: William Jackson Keighley (August 4, 1889, Philadelphia, Pennsylvania – June 24, 1984, New York, New York) was an American stage actor and Hollywood film director.

Superman II: The Richard Donner Cut: Superman II: The Richard Donner Cut is a re-edited director's cut of the 1980 film "Superman II".  It features a significant amount of lost footage shot by the original director, Richard Donner, in 1977 before he was taken off the project and replaced by Richard Lester, who completed the film for its theatrical release.  In 2000, during the DVD restoration of "Superman: The Movie", editor Michael Thau became interested in completing Donner's version of "Superman II".  In 2006, Donner's footage of Marlon Brando was discovered and used in Bryan Singer's "Superman Returns", finally creating the possibility of restoring Donner's cut.

The Match King: The Match King is a 1932 American Pre-Code drama film made by First National Pictures, directed by William Keighley and Howard Bretherton.  The film starred Warren William and Lili Damita, and follows the rise and fall of Swedish safety match tycoon Ivar Kreuger.  Based on the novel by Einar Thorvaldson, the film was released in December 31, 1932.

Richard Donner: Richard Donner (born Richard Donald Schwartzberg; April 24, 1930) is an American director and producer of film and television.  After directing the horror film "The Omen" (1976), Donner became famous for directing the first modern superhero film, "Superman" (1978), starring Christopher Reeve.

Jenma Natchathiram: Jenma Natchathiram (தமிழ்: ஜென்ம நட்சத்திரம், English: Birth Star) is a 1991 Tamil supernatural horror film directed and Screenplays by Thakkali Srinivasan for Thirai Gangai Films.  The film dialogue were written by Ma.  Pandarinathan, and story were written by Krishnan respectively.  Music by Premi - Srini assets to the soundtrack.  It Stars Baby Vichithra played titular role with Pramoth, Sindhuja and Vivek played pivotal role.  The film was unofficial remake of "The Omen", 1976 British/American supernatural horror drama film directed by Richard Donner.

Mary Jane's Pa: Mary Jane's Pa is a 1935 American drama film directed by William Keighley and written by Tom Reed and Peter Milne.  The film stars Aline MacMahon, Guy Kibbee, Tom Brown, Robert McWade, Minor Watson and Nan Grey.  The film was released by Warner Bros. on April 27, 1935.

Varsity Show (film): Varsity Show is a 1937 American musical film released by Warner Brothers Warner Bros..  The film was directed by William Keighley from a script by Jerry Wald, Richard Macaulay, Warren Duff and Sig Herzig.  The movie features songs by Richard A. Whiting and many others.  The finale was directed by Busby Berkeley.

Journal of a Crime: Journal of a Crime is a 1934 American pre-Code film produced by First National Pictures, directed by William Keighley, and starring Ruth Chatterton, Adolphe Menjou, and Claire Dodd.  The film is a remake of the 1933 French film, "Une vie perdue",

Supporting paragraphs: Richard Donner William Keighley
Answer: Richard Donner