Cornell George Hopley-Woolrich (4 December 1903 ? 25 September 1968) was an American novelist and short story writer who sometimes wrote under the pseudonyms William Irish and George Hopley.

His biographer, Francis Nevins Jr., rated Woolrich the fourth best crime writer of his day, behind only Dashiell Hammett, Erle Stanley Gardner and Raymond Chandler. A check of film titles reveals that more film noir screenplays were adapted from works by Woolrich than any other crime novelist, and many of his stories were adapted during the 1940s for Suspense and other dramatic radio programs.

His 1942 story "It Had to Be Murder, published in Dime Detective Magazine (February, 1942)" was the source for the 1954 Alfred Hitchcock movie Rear Window.

There is no entry about the story available on Wikipedia at this time, but here is a link to the film entry.