In one scene Joan Manion (played by Joan Leslie) is asked by Fred Atwell - a.k.a. Fred Burton (played by Fred Astaire) if her boss, Mr. Harriman (played by Robert Benchley), has ever proposed marriage to her: She replies that he has attempted to numerous times, but keeps getting side-tracked by discussions of such things as the "love life of a polyp". It turns out that in one of Robert Benchley's earliest films he played a "Doctor Benchley" in the film The Sex Life of the Polyp (1928) where he lectures Women's Clubs on this interesting creature that can change its sex.

Fred Astaire cut his shins and ankles on the broken glass generated during "One for My Baby."

Some moviegoers complained after the movie came out about the amount of glass that was destroyed by Fred during his solo dance number in the bar, as Americans had been contributing similar items for the war effort.

Joan Leslie's mouthed words at the fadeout were intended to be indecipherable.

A Fred Astaire solo dance number (on a railroad track) was cut from the film, although a print containing it was shown in New York until at least 1948.

Fred Astaire's character says he learned to dance at the 'Arthur Murray' dancing school. Astaire had previously been in a dispute with the company over the unauthorized use of his likeness.

Joan Leslie's vocals for "My Shining Hour" were dubbed by Sally Sweetland.

Joan asks Phil why she can't be sent to Russia like Margaret Bourke-White. Bourke-White was a very well known photographer for Life magazine at the time, being hired as the publication's first female staff photographer in 1936. Bourke-White was the first female war correspondent and the first woman to be allowed to work in combat zones during World War II. In 1941 she traveled to the Soviet Union just as Germany broke its non-aggression pact with them. She was the only foreign photographer in Moscow when Nazi forces invaded on June 22, 1941.

The character played by Fred Astaire refers to Ginger Rogers and Rita Hayworth, Astaire's former co-stars.

Cut from the film was a home-front-flavored swing number, "Harvey, the Victory Garden Man" (music by Harold Arlen, lyrics by Johnny Mercer), sung by Ella Mae Morse to the backing of Freddie Slack and His Orchestra.

In the scene where Mr. Harriman (Robert Benchley) gives Joan Manion (Joan Leslie) the photography assignment, there are several framed pictures behind him which appear to be the famous Vargas girls.

The song "Hangin' on to You" was written for the film but not used.

"Screen Director's Playhouse" broadcast a 30 minute radio adaptation of the movie on April 24, 1949 with Fred Astaire reprising his film role, with Sharon Douglas as his co-star.

In order to acquire the services of Joan Leslie for this film and John Garfield for The Fallen Sparrow (1943) RKO gave the remake rights of The Animal Kingdom (1932) and Of Human Bondage (1934) to Warner Bros.

The character played by Joan Leslie refers to James Cagney, Leslie's former co-star.

Bernard Pearce was hired as choreographer but was let go a few weeks before filming.

One of the few movies where Fred Astaire doesn't dance in his trademark attire of top hat and tails.

During the build-up to the finale of "I've Got a Lot In Common With You", Fred's part of the routine passively disturbs the soldier he met before the number who needed to go to town when he dances.