The Tree's Knees is a 1931 American animated comedy short film. It is the twelfth film in the Looney Tunes series featuring Bosko. It was released as early as May 16, 1931. It was the last cartoon in the series to be directed by both Hugh Harman and Rudolf Ising, and the first to be produced by Leon Schlesinger beyond an associate producer credit. Every Looney Tunes cartoon after this was directed by Hugh Harman until 1933, and every Merrie Melodies cartoon was directed by Rudolf Ising until the aforementioned year. The short reuses animation Ain't Nature Grand!. The film score was composed by Frank Marsales.