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.

Question: Any other famous friends?
Self-contained rewrite: Did Gary Cooper have any other famous friends besides Ernest Hemingway?