Let's All Be Americans Now is a World War I song written and composed by Irving Berlin, Edgar Leslie, and George W.

[1] The song was first published in 1917 by Waterson, Berlin & Snyder Co., in New York, NY, appearing in the Broadway musical, 'Dance and Grow Thin'.

[2] The sheet music cover depicts a soldier with his rifle and silhouetted marching soldiers in the background.

[3] A popular recording in 1917 was made by the American Quartet.

[4] The sheet music can be found at the Pritzker Military Museum & Library.