Question: The Girl He Left Behind is a 1956 romantic comedy film starring, Tab Hunter and Natalie Wood, The supporting cast includes which American actor, producer, and voice artist?

Context paragraphs:
Pandemonium (1982 film): Pandemonium is a 1982 comedy film spoofing horror movies.  It had an ensemble cast including Eileen Brennan, Phil Hartman, Tab Hunter, Carol Kane, David Lander, Eve Arden, Paul Reubens, and Tom Smothers.

The Ambassador's Daughter (1956 film): The Ambassador's Daughter is a 1956 romantic comedy film starring Olivia de Havilland and John Forsythe.

The Great Race: The Great Race is a 1965 American Technicolor slapstick comedy film starring Jack Lemmon, Tony Curtis, and Natalie Wood, directed by Blake Edwards, written by Blake Edwards and Arthur A. Ross, and with music by Henry Mancini and cinematography by Russell Harlan.  The supporting cast includes Peter Falk, Keenan Wynn, Arthur O'Connell and Vivian Vance.  The movie cost US$12 million, making it the most expensive comedy film at the time.

Marjorie Morningstar (film): Marjorie Morningstar is a 1958 melodrama film based on the 1955 novel of the same name by Herman Wouk.  The film, released by Warner Bros. and directed by Irving Rapper tells a fictional coming of age story about a young Jewish girl in New York City in the 1950s.  The film's trajectory traces Marjorie Morgenstern's attempts to become an artist - exemplified through her relationship with the actor and playwright Noel Airman.  The film's cast includes Natalie Wood, Gene Kelly, and Claire Trevor.

The Burning Hills: The Burning Hills is a 1956 Warner Bros. CinemaScope Western starring Tab Hunter and Natalie Wood, based on a 1956 novel by Louis L'Amour.

The Girl He Left Behind: The Girl He Left Behind is a 1956 romantic comedy film starring Tab Hunter and Natalie Wood.  The supporting cast includes Jim Backus, Alan King, James Garner, and David Janssen.  The film was written by Guy Trosper and directed by David Butler, and was filmed at Fort Ord, California.  For Garner and King, it was just their third movie.

The Over-the-Hill Gang Rides Again: The Over-the-Hill Gang Rides Again starring Walter Brennan and Fred Astaire is a 1970 "ABC Movie of the Week" sequel to the Western comedy "The Over-the-Hill Gang".  The supporting cast includes Edgar Buchanan, Andy Devine, Chill Wills, Lana Wood, and Burt Mustin (all of whom, except Wood, were in "The Over-the-Hill Gang").  Like the 1969 original, the sequel involves aging Texas Rangers and was written by Richard Carr and directed by George McCowan.  Pat O'Brien had played the second lead in the first film but his character was left out of the sequel and he was effectively replaced by Astaire, who was not in the original film.  Richard Widmark played O'Brien's character in a quasi-remake two decades later entitled "Once Upon a Texas Train", in which the Over-the-Hill Gang, with an entirely new cast including Stuart Whitman, played supporting roles to Willie Nelson's train robber.

James Garner: James Garner (born James Scott Bumgarner; April 7, 1928 – July 19, 2014) was an American actor, producer, and voice artist.  He starred in several television series over more than five decades, including such popular roles as Bret Maverick in the 1950s western comedy series "Maverick" and Jim Rockford in "The Rockford Files", and played leading roles in more than 50 theatrical films, including "The Great Escape" (1963) with Steve McQueen, Paddy Chayefsky's "The Americanization of Emily" (1964), "Grand Prix" (1966), Blake Edwards' "Victor/Victoria" (1982), "Murphy's Romance" (1985), for which he received an Academy Award nomination, "Space Cowboys" (2000) with Clint Eastwood, and "The Notebook" (2004).

The Fickle Finger of Fate: The Fickle Finger of Fate (also known as El Dedo del destino and The Cup of St. Sebastian) is a 1967 comedy film directed by Richard Rush, produced by Sidney W. Pink, and starring Tab Hunter.  Hunter stars as a clumsy businessman who accidentally gets wrapped up in a plot of intrigue while on a trip to Spain.

Tab Hunter Confidential: Tab Hunter Confidential is a 2015 American documentary feature film focusing on the American actor, singer, and author Tab Hunter, and is inspired by his autobiography of the same name.  Produced by Allan Glaser in association with Automat Pictures, the film was directed by Jeffrey Schwarz.

Supporting paragraphs: The Girl He Left Behind James Garner
Answer: James Garner