"It's A Big, Wide, Wonderful World" is a popular song written by John Rox and published in 1939.
The song first appeared in the short-lived 1940 Broadway musical play All in Fun when it was introduced by Walter Cassel and Wynn Murray.
It was also featured in the film Sweet Bird of Youth (1962) when it was played as background music in the swimming scene.
(Charlene Dallas breaks into song at dinner table until silenced by Slim Pickens.
)[6] It is sung by cousins Izzy and Jules played by Kevin Pollak and Aidan Quinn in the 1990 film Avalon.