The song "True Love", written by Cole Porter especially for the movie, was a million seller and both Grace Kelly and Bing Crosby were awarded platinum records for the song. This is the only platinum record ever given to sitting royalty as Grace Kelly had become Princess Grace by the time it was awarded.
The song "Well, Did You Evah?" (from a previous Cole Porter musical) was added at the last minute after it was realized that there wasn't a song for Bing Crosby and Frank Sinatra to sing together.
Grace Kelly, recently engaged to Prince Rainier of Monaco, wore her actual engagement ring for her character's engagement ring. The ring is a 10.5-carat, emerald-cut, diamond flanked by two baguettes.