The #1 moneymaker of 1943.
When Irving Berlin was filming his rendition of "Oh, How I Hate to Get Up in the Morning", one of the stagehands, unaware of who the singer was, supposedly said that if the guy who wrote the song could hear Berlin's singing, he'd roll over in his grave.
Bette Davis insisted Warners studio boss Jack L. Warner contribute the profits from this film to the war effort. All profits were donated to the Air Force Benevolent Fund. Production staff took no salaries as their contribution to the war effort.
"Yip Yip Yaphank," the World War I all-soldier show featured at the beginning of the movie, was an actual World War I all-soldier show. It was composed and produced by Irving Berlin while he was a US Army recruit at Camp Upton in Yaphank, NY.
The first Warner Bros. musical shot in three-strip Technicolor.