I Wonder What They're Doing To-Night (Your Girl and Mine)

{{Infobox song

| name = I Wonder What They’re Doing Tonight (Your Girl and Mine)

| cover = IWonderWhatTheyreDoingToNight.jpg

| alt =

| caption = Sheet music cover

| type =

| written =

| published = 1918

| writer =

| composer = John C. Egan

| lyricist = Lew Brown, Al Harriman

}}

"I Wonder What They’re Doing Tonight (Your Girl and Mine)" is a 1918 song by composer John C. Egan and lyricists Lew Brown and Al Harriman. It was published by the Broadway Music Corp.{{cite web|title= I Wonder What They're Doing Tonight (Your Girl and Mine)|url= http://www.pritzkermilitary.org/explore/library/online-catalog/view/oclc/498581815 |publisher=Pritzker Military Museum & Library|accessdate=14 June 2016}} A version of the song was recorded by Arthur Fields.{{cite web|url=http://adp.library.ucsb.edu/index.php/talent/detail/56593/Fields_Arthur_vocalist_tenor_vocal|title=Arthur Fields (vocalist : tenor vocal)|publisher=Discography of American Historical Recordings, University of California, Santa Barbara}}