Springtime in the Sierras
Springtime in the Sierras is a 1947 American Trucolor Western film directed by William Witney and starring Roy Rogers, Trigger, Jane Frazee and Andy Devine.
The film is now in the public domain.
Across the Sierras
Across the Sierras is a 1941 American Western film directed by D. Ross Lederman and starring Bill Elliott.
A Brief History of Time (film)
A Brief History of Time is a 1991 biographical documentary film about the physicist Stephen Hawking, directed by Errol Morris.
The title derives from Hawking's bestselling book" A Brief History of Time", but whereas the book is an explanation of cosmology, the film is a biography of Hawking's life, featuring interviews with family members, colleagues, and even his childhood nanny.
The music is by frequent Morris collaborator, Philip Glass.
The film project originated with executive producer Gordon Freedman who brought the project to Anglia Television as a co-producer.
After acquiring the property, Freedman met with director Steven Spielberg for advice on how to make the project into an important documentary film.
Spielberg suggested Errol Morris as director.
Freedman's production company partnered with Anglia Television and Tokyo Broadcasting.
David Hickman, of Anglia, became the film's producer.
Scotty Fox
Scott Fox is a pornographic film director who is a member of the AVN Hall of Fame.
Errol Morris
Errol Mark Morris( born February 5, 1948) is an American film director primarily of documentaries examining and investigating, among other things, authorities and eccentrics.
His 1988 documentary" The Thin Blue Line" is cited among the best and most influential documentaries ever made.
In 2003, his documentary film" The Fog of War: Eleven Lessons from the Life of Robert S. McNamara" won the Oscar for Best Documentary Feature.
William Witney
William Nuelsen Witney( May 15, 1915 – March 17, 2002) was an American film and television director.
He is best remembered for the movie serials he co-directed with John English for Republic Pictures such as" Daredevils of the Red CircleZorro's Fighting Legion" and" Drums of Fu Manchu".
Dan Milne
Dan Milne is a British actor/ director who is possibly best known for his role in" EastEnders".
Ben Palmer
Ben Palmer is a British film and television director who is known for being the director of" Bo' Selecta" and" The Inbetweeners".
Joaquin Miller
Cincinnatus Heine Miller( September 8, 1837 – February 17, 1913), better known by his pen name Joaquin Miller, was an American poet and frontiersman.
He is nicknamed the" Poet of the Sierras" after the Sierra Nevada, about which he wrote in his" Songs of the Sierras"( 1871).
Elliot Silverstein
Elliot Silverstein( born August 3, 1927, in Boston, Massachusetts) is an American director, who is best known for being the director of the movie" Cat Ballou"( 1965).

Question: Which film has the director who is older than the other, A Brief History Of Time (Film) or Springtime In The Sierras? 
Answer: Springtime In The Sierras