Conversation so far:
Did Gary Cooper have any particularly famous friends?
He had a twenty year friendship with the author Ernest Hemingway.
How did Gary Cooper and Ernest Hemingway meet?
They first met in the fall of 1940 and had gone hunting in Sun Valley, Idaho, for ducks and pheasants.
Did Gary Cooper have any other famous friends besides Ernest Hemingway?
Henry Hathaway, Howard Hawks, William Wellman, and Fred Zinnemann, and actors Joel McCrea, James Stewart, Barbara Stanwyck, and Robert Taylor.
What were some of Gary Cooper’s interests outside of being in movies?
As well as hunting, Cooper enjoyed riding, fishing, skiing, and later in life, scuba diving.
Did Gary Cooper and Hemingway have any interesting events of note together?
In 1939 Hemingway drew upon Cooper's image when he created the character of Robert Jordan for the novel For Whom the Bell Tolls.

Question: Did the two meet while working on a movie?
Self-contained rewrite: Did Ernest Hemingway and Gary Cooper meet while working on a movie?