Question: What American actor received a posthumous credit for a Walt Disney film that was released on January 29, 1959?
Context: Home on the Range is a 2004 American animated musical western comedy film produced by Walt Disney Feature Animation and released by Walt Disney Pictures.  The 45th Disney animated feature film, it was the last 2D animated Disney film released until "The Princess and the Frog" in 2009.  Named after the popular country song of the same name, "Home on the Range" features the voices of Roseanne Barr, Judi Dench, Jennifer Tilly, Cuba Gooding Jr., Randy Quaid, and Steve Buscemi.  The film is set in the Old West, and centers on a mismatched trio of dairy cows—brash, adventurous Maggie; prim, proper Mrs. Caloway; and ditzy, happy-go-lucky Grace.  The three cows must capture an infamous cattle rustler named Alameda Slim for his bounty in order to save their idyllic farm from foreclosure.  Aiding them in their quest is Lucky Jack, a feisty, peg-legged rabbit, but a selfish horse named Buck, eagerly working in the service of Rico, a famous bounty hunter, seeks the glory for himself. Disney's All-Star Movies Resort is a resort hotel located at the Walt Disney World Resort.  It is one of five Disney Resorts in the "Value" category along with Disney's All-Star Sports Resort, Disney's All-Star Music Resort, Disney's Pop Century Resort, and Disney's Art of Animation Resort.  The resort is located on the southern portion of the Walt Disney World property, and has a Disney Movie theme.  Like all Disney Value resorts, the property is decorated with giant Disney film icons such as the Fantasia Pool; a "Mighty Ducks"-themed Duck Pond Pool; Herbie, The Love Bug; puppies from "One Hundred and One Dalmatians"; and some of the residents of Andy's Room from Pixar's "Toy Story".  Like the other value resorts, the All-Star Movies has a large food court and poolside bar. Robert Wayne Amsberry (June 2, 1928—November 21, 1957) was an American actor, and one of the original cast members on the first two seasons of Walt Disney's "The Mickey Mouse Club", working as both a writer and actor.  Amsberry also worked as a voice actor, with a posthumous credit in Disney's "Sleeping Beauty" (1959). Walt Disney Pictures, Inc. is an American film production company and a subsidiary of Walt Disney Studios, owned by The Walt Disney Company.  The division is based at the Walt Disney Studios in Burbank, California, and is the main producer of live-action feature films within the Walt Disney Studios unit.  It took on its current name in 1983.  Today, in conjunction with the other units of Walt Disney Studios, Walt Disney Pictures is classified as one of Hollywood's "Big Six" film studios.  Films produced by Walt Disney Animation Studios and Pixar Animation Studios are also released under this brand. The "Disney Vault" is the term used by Walt Disney Studios Home Entertainment for its policy of putting many of its most popular home video releases of Walt Disney Animation Studios's animated features on moratorium.  Each Disney film is available for purchase for a limited time, after which it is put "in the vault" and not made available in stores for several years until it is once again released.  This also means digital copies are not available on Disney Movies Anywhere when those movies are currently in the Disney Vault. Pinocchio is the soundtrack to the 1940 Walt Disney film of the same name, first released on February 9, 1940.  The album was described as being "recorded from the original soundtrack of the Walt Disney Production "Pinocchio"".  According to Walt Disney Records, "this is the first time the phrase 'original soundtrack' was used to refer to a commercially available movie recording". Peter Pan is a 1953 American animated adventure film produced by Walt Disney and based on the play "Peter Pan, or The Boy Who Wouldn't Grow Up" by J. M. Barrie.  It is the 14th Disney animated feature film and was originally released on February 5, 1953, by RKO Radio Pictures.  "Peter Pan" is the final Disney animated feature released through RKO before Walt Disney's founding of his own distribution company, Buena Vista Distribution, later in 1953 after the film was released.  "Peter Pan" is also the final Disney film in which all nine members of Disney's Nine Old Men worked together as directing animators.  It is also the second Disney animated film starring Kathryn Beaumont, Heather Angel, and Bill Thompson after their roles in the animated feature "Alice in Wonderland". Sleeping Beauty is a 1959 American animated musical fantasy film produced by Walt Disney based on "The Sleeping Beauty" by Charles Perrault.  The 16th Disney animated feature film, it was released to theaters on January 29, 1959, by Buena Vista Distribution.  This was the last Disney adaptation of a fairy tale for some years because of its initial mixed critical reception and underperformance at the box office; the studio did not return to the genre until 30 years later, after Walt Disney died in 1966, with the release of "The Little Mermaid" (1989). Earle Rodney (4 June 1888 – 16 December 1932) was a Canadian screenwriter, actor, and film director.  He wrote for 108 films between 1926 and 1947 (posthumous credit).  He also acted in 69 films between 1915 and 1929. Paul Leonard Newman (January 26, 1925 – September 26, 2008) was an American actor, film director, producer, race car driver, IndyCar owner, entrepreneur, activist, and philanthropist.  He won and was nominated for numerous awards, winning an Academy Award for his performance in the 1986 film "The Color of Money", a BAFTA Award, a Screen Actors Guild Award, a Cannes Film Festival Award, an Emmy Award, and many others.  Newman's other roles include the title characters in "The Hustler" (1961) and "Cool Hand Luke" (1967), as well as "Butch Cassidy and the Sundance Kid" (1969), as Butch Cassidy, "The Sting" (1973), and "The Verdict" (1982).  He also voiced Doc Hudson in the first installment of Disney-Pixar's "Cars", and received a posthumous credit for his voice recordings in "Cars 3" (2017).
Answer: Robert Wayne Amsberry