Listen: Billie Eilish's new song 'Everything I Wanted'.

After announcing a new song was on the way, Billie Eilish has treated fans to a brand new song, 'Everything I Wanted', a heartfelt song that was written with and produced by her brother Finneas.

About the song, Billie shared that it's a song that: "My brother and I wrote about each other. No matter what happens, we always have been and will be there to make it better.”

Listen to 'Everything I Wanted' below...