“All the Things You Are” is a popular jazz standard composed by Jerome Kern with lyrics by Oscar Hammerstein II. First introduced in the 1939 musical Very Warm for May, the song has become a favorite among musicians and vocalists, known for its rich harmonic structure and emotional depth. The song's melody is characterized by its flowing lines and complex chord progressions, making it a staple in jazz improvisation. Many artists, including Ella Fitzgerald and Frank Sinatra, have recorded their interpretations, contributing to its enduring legacy in the world of music.