WATCH: The trailer for Billie Eilish's documentary

We know Billie Eilish and her brother Finneas recorded her debut album from her childhood bedroom, but there is still so much we don't know about the pop star. 

That's about to change as next year we will be getting to see Billie's documentary "Billie Eilish: The World's A Little Bit Blurry'.

Will you be watching?