White Fang is a 1991 American Northern adventure film directed by Randal Kleiser, starring Ethan Hawke, Klaus Maria Brandauer and Seymour Cassel.
 Based on Jack London's novel "White Fang", it tells the story of the friendship between a Yukon gold hunter and a wolfdog.
Summer Lovers is a 1982 American romantic comedy film written and directed by Randal Kleiser, starring Peter Gallagher, Daryl Hannah and Valerie Quennessen.
 It was filmed on location on the island of Santorini, Greece.
 The original music score is composed by Basil Poledouris.
 "Summer Lovers" featured "Hard to Say I'm Sorry", a No. 1 hit for Chicago and "I'm So Excited" by The Pointer Sisters.
The Boy in the Plastic Bubble is a 1976 American made-for-television drama film inspired by the lives of David Vetter and Ted DeVita, who lacked effective immune systems.
 It stars John Travolta, Glynnis O'Connor, Diana Hyland, Robert Reed, and P.J. Soles.
 It was written by Douglas Day Stewart, executive produced by Aaron Spelling and Leonard Goldberg (who, at the time, produced "Starsky and Hutch" and "Charlie's Angels"), and directed by Randal Kleiser, who would work with Travolta again in "Grease" shortly after.
 The original music score was composed by Mark Snow.
 The theme song "What Would They Say" was written and sung by Paul Williams.
 William Howard Taft High School in Woodland Hills was used for filming.
The Blue Lagoon is a 1980 American romantic adventure drama film directed by Randal Kleiser and filmed on Turtle Island in Fiji.
 The screenplay by Douglas Day Stewart was based on the 1908 novel "The Blue Lagoon" by Henry De Vere Stacpoole.
 The film stars Brooke Shields and Christopher Atkins.
 The music score was composed by Basil Poledouris and the cinematography was by Néstor Almendros.
John Randal Kleiser (born July 20, 1946) is an American film director and producer, best known for directing the 1978 musical romantic comedy film "Grease".
Flight of the Navigator is a 1986 American science fiction adventure film directed by Randal Kleiser and written by Mark H. Baker, Michael Burton and Matt MacManus.
 The film stars Joey Cramer as David Freeman, a 12-year-old boy who is abducted by an alien spaceship and finds himself caught in a world that has changed around him.
Shadow of Doubt is a 1998 American independent mystery-thriller film directed by Randal Kleiser and starring Melanie Griffith, Tom Berenger, Craig Sheffer, and Huey Lewis.
Grandview, U.S.A. is a 1984 American comedy film directed by Randal Kleiser and starring Jamie Lee Curtis, Patrick Swayze, C. Thomas Howell, Jennifer Jason Leigh, Carole Cook, Ramon Bieri, John Cusack, Joan Cusack, M. Emmet Walsh, Michael Winslow, Troy Donahue and Steve Dahl.
 The original music score is composed by Thomas Newman.
 It was filmed on location in Pontiac, Illinois.
It's My Party is a 1996 American drama film written and directed by Randal Kleiser, it was one of the first feature films to address the topic of AIDS patients dying with dignity.
Kenneth William "Ken" Kwapis (born August 17, 1957) is an American film and television director and screenwriter.
 He specialized in the single-camera sitcom in the 1990s and 2000s and has directed feature films such as "Sesame Street Presents Follow That Bird" (1985), "The Sisterhood of the Traveling Pants" (2005), and "He's Just Not That into You" (2009).

Question: Randal Kleiser and Ken Kwapis, are American, and have which common occupation?
Answer: film director