Brian Levine (born November 22, 1963), best known as Brian Robbins, is an American actor, film director, film producer, television director, television producer and occasional screenwriter.
 He often collaborates with producer Michael Tollin.
Bill Cracks Down is a 1937 American film directed by William Nigh.
 The film is also known as Men of Steel in the United Kingdom.
Gangster's Boy is a 1938 American film directed by William Nigh.
Mr. Wise Guy is a 1942 American film starring The East Side Kids and directed by William Nigh.
A Bride for Henry is a 1937 American film directed by William Nigh.
Hoosier Schoolboy is a 1937 American film directed by William Nigh.
William Nigh (October 12, 1881 – November 27, 1955) was an American film director, writer, and actor.
 His film work sometimes lists him as either "Will Nigh" or "William Nye".
Black Dragons is a 1942 American film directed by William Nigh and starring Bela Lugosi, Joan Barclay, and George Pembroke.
 The cast includes Clayton Moore (later famous as the Lone Ranger), who plays a handsome detective.
 The Black Dragon Society also appears in "Let's Get Tough!
" a 1942 East Side Kids film made by the same team of writer Harvey Gates and producer Sam Katzman.
The Law Commands is a 1937 American film directed by William Nigh.
Zis Boom Bah is a 1941 American film directed by William Nigh.
 The film is also known as College Sweethearts.

Question: Were William Nigh and Brian Robbins both American film directors?
Answer: yes