Little Mr. Roo is a song from the film Pooh's Heffalump Movie. The opening of the song is performed by Kath Soucie as Kanga, with the remainder performed by Carly Simon. The song focuses on Roo, who Kanga feels is "reaching for the moon" and shouldn't be in such a hurry to grow up, but should instead "take some time for dreaming. Later in the film, Roo performs a brief reprise of the song to try to cheer up his new friend, Lumpy.