| Once considered becoming a political cartoonist. |
| His father was a Montana State Supreme Court Justice. |
| Was good friends with Ernest Hemingway and starred in two films, A Farewell to Arms and For Whom the Bell Tolls, based on the author's novels. |
| Was WWI hero Alvin York's personal choice to portray him in 1941's Sergeant York, for which he won Best Actor. |
| Played Major League great Lou Gehrig in 1942's The Pride of the Yankees despite not being able to play baseball, and not being a left-hander. |
| U.S. Treasury Department claimed he was the highest paid American in 1939. |
| Took the first name Gary at the suggestion of his agent, Nan Collins, who grew up in Gary, IN. |
| Started his film career as a cowboy extra in silent Westerns. |