- Actor-Shared Background: Oscar Levant (Adam) was a real-life pianist and composer with a wry personality not unlike his character's.
- AFI's 100 Years... Series:
- Cut Song: A scene in which Gene Kelly dances and sings "I've Got a Crush on You" while in his pajamas was filmed but did not make final cut.
- Directed By Castmember: Even though Vincente Minnelli is credited as the sole director, he was sometimes tied up with his divorce from Judy Garland and other directing projects, leaving Gene Kelly to take over the directing duties.
- Prop Recycling: Leslie Caron's costumes were largely borrowed from Elizabeth Taylor's in Father of the Bride.
- Recursive Adaptation / The Musical: A rare example of a movie adaptation from an orchestral piece! An American in Paris, Exactly What It Says on the Tin, is a 1928 composition by George Gershwin. The idea was to make a ballet out of it, but the movie ended up as a musical based on Gershwin tunes, including the longest dance sequence in any musical dance movie at the time, to make up for the original Gershwin score, which actually was expanded!
- What Could Have Been:
Trivia / An American in Paris