William Keighley
William Jackson Keighley (August 4, 1889, Philadelphia, Pennsylvania – June 24, 1984, New York, New York) was an American stage actor and Hollywood film director.
After graduating from the Ludlum School of Dramatic Art, Keighley began acting at the age of 23.
By the 1910s and 1920s, he was acting and directing on Broadway.
With the advent of talking pictures, he relocated to Hollywood.
He eventually signed with Warner Bros., where he proved adept at directing in a wide variety of genres.
He was the initial director of "The Adventures of Robin Hood", starring Errol Flynn and Olivia de Havilland, but was replaced by Michael Curtiz.
During World War II, he supervised the First Motion Picture Unit of the U.S. Army Air Forces.
He retired in 1953 and moved to Paris with his actress wife Genevieve Tobin.
In retirement he became an award-winning, renowned still photographer.
He died of a stroke.
Ruth Weyher
Ruth Weyher( 28 May 1901 – 27 January 1983) was a German film actress of the silent era.
She appeared in 60 films between 1920 and 1930.
She starred in the 1926 film" Secrets of a Soul", which was directed by Georg Wilhelm Pabst.
Nancy Saunders
Nancy Saunders( born June 29, 1925) is an actress of film, television and the stage.
Secrets of an Actress
Secrets of an Actress is a 1938 romantic drama film directed by William Keighley, and starring Kay Francis, George Brent, and Ian Hunter.
It is about a love triangle between a stage actress, her financial backer, and his friend.
Sandra Voe
Sandra Voe( born 6 October 1936) is an actress of film, television, and theatre.
Manoush
Manoush is an actress and singer.
Hayley Angel Holt
Hayley Angel Holt( previously: Wardle) is an actress born in London, England.
Peter Levin
Peter Levin is an American director of film, television and theatre.
Ian Barry (director)
Ian Barry is an Australian director of film and TV.
Jinal Belani
Jhinal Belani( born 29 April 1994) is an actress born and brought up in Mumbai, India.

Question: What is the place of birth of the director of film Secrets Of An Actress?
Answer: Philadelphia