One Is a Lonely Number (also known as Two Is a Happy Number) is a 1972 American drama film directed by Mel Stuart and starring Trish Van Devere, Janet Leigh and Melvyn Douglas.
 The screenplay, based upon the short story "The Good Humor Man" by Rebecca Morris, was written by David Seltzer.
Willy Wonka & the Chocolate Factory is a 1971 American musical fantasy film directed by Mel Stuart, and starring Gene Wilder as Willy Wonka.
 It is an adaptation of the 1964 novel "Charlie and the Chocolate Factory" by Roald Dahl.
 Dahl was credited with writing the film's screenplay; however, David Seltzer, who went uncredited in the film, was brought in to re-work Dahl's screenplay against his wishes, making major changes to the ending and adding musical numbers.
 These changes and other decisions made by the director led Dahl to disown the film.
is a 1986 American teen tragicomedy film directed by David Seltzer and starring Corey Haim, Kerri Green, Charlie Sheen and Courtney Thorne-Smith.
 The film was Winona Ryder's screen debut.
Shining Through is an American World War II drama film which was released to United States cinemas on January 31, 1992, written and directed by David Seltzer and starring Michael Douglas and Melanie Griffith, with Liam Neeson, Joely Richardson and John Gielgud in supporting roles.
 It is based on the novel of the same name by Susan Isaacs.
 The original music score was composed by Michael Kamen.
 The film's tagline is: ""He needed to trust her with his secret.
 She had to trust him with her life.""
John Robert Magaro (born February 16, 1983) is an American film, television and stage actor.
 He starred alongside James Gandolfini in "Not Fade Away" (2012) — the feature film debut of David Chase, creator of "The Sopranos".
 He also starred alongside Rooney Mara in "Carol" (2015).
 He made his Broadway debut as Earl Williams, the escaped convict, in the hit revival of The Front Page in 2016.
Andrew W. Walker (born June 9, 1979) is a Canadian actor and film producer.
 He made his film debut in "Laserhawk" (1997), followed by roles in American television series such as "Maybe It's Me", "Sabrina the Teenage Witch", and "Hot Properties".
 He also starred alongside Academy Award-nominated actor David Strathairn in "Steel Toes" (2006), which earned him an ACTRA Award for Best Actor in 2008.
 He subsequently appeared in films such as "The Mountie" and "The Gundown", and had a starring role on the Lifetime cop drama "Against the Wall".
David Seltzer (born 1940) is an American screenwriter, producer and director, perhaps best known for writing the screenplays for "The Omen" (1976) and "Bird on a Wire" (1990).
 As writer-director, Seltzer's credits include the 1986 teen tragi-comedy "Lucas" starring Corey Haim, Charlie Sheen and Winona Ryder, the 1988 comedy "Punchline" starring Sally Field and Tom Hanks, and 1992's "Shining Through" starring Melanie Griffith and Michael Douglas.
David Huynh (born February 5, 1983) is a Canadian actor.
 Huynh won a Special Jury Prize Award at the 2007 Los Angeles Asian Pacific Film Festival for Outstanding Newcomer and Best Emerging Actor for his performance in Juwan Chung's "Baby", which also won a Special Jury Award for Best Feature Length Film at that year's Festival.
 Huynh has also Starred in Byron Q's film, "Bang Bang" (2011), which won a Special Jury Award for Best First Feature, Narrative, at the 2011 Los Angeles Asian Pacific Film Festival.
 He also played Jonathan Chen in Byron Q's film, "Las Vegas Story" and Ty Do in Mark Tran's film "All About Dad".
 He recently stars in a Web Series entitled "Hollywood Aliens" from Beyond Cinema Productions, directed by "Bang Bang" Director Byron Q and Kevin Boston.
 He also appears as the protagonist "Fong" in a pilot entitled "Chinatown Squad" about 1890s San Francisco Chinatown, directed and produced by Stephane Gauger and written by and starring "Baby" co-star Feodor Chin, who plays the antagonist, "Pistol Pete."
 He has also starred as Benson Fong in Timothy Tau's short film bio-pic Keye Luke, which premiered at the 2012 Los Angeles Asian Pacific Film Festival and which was Closing Night Film of the inaugural 2013 Seattle Asian American Film Festival.
Corey Ian Haim (December 23, 1971 – March 10, 2010) was a Canadian actor, known for a 1980s Hollywood career as a teen idol.
 He starred in a number of films, such as "Lucas", "Silver Bullet", "Murphy's Romance", "License to Drive", "Dream a Little Dream", and "Snowboard Academy".
 His best-known role was alongside Corey Feldman in "The Lost Boys", which made Haim a household name.
The Eighteenth Angel is a 1997 American film, starring Christopher McDonald, Rachael Leigh Cook, Stanley Tucci, Wendy Crewson and Maximilian Schell.
 It was directed by William Bindley and written by David Seltzer.

Question: David Seltzer was a writer-director for a 1986 teen tragi-comedy starring a Canadian actor who also starred alongside Corey Feldmen in what film?
Answer: The Lost Boys