Brit Heyworth Marling was born in Chicago, Illinois, to Heidi (Johnson) and John Marling, both of whom work in real estate. She graduated from Georgetown University, with a bachelor's in economics, and was offered a job with Goldman Sachs, which she turned down in favour of a career as an artist. She moved to Los Angeles to act and, after spending a couple of years exploring the movie industry and being offered roles as "the cute blonde in horror movies", she taught herself to write, reasoning that the best way to get decent parts was to write them, herself. She worked on two movies, simultaneously - one in the mornings, one in the afternoons - and eventually both Another Earth (2011) and Sound of My Voice (2011) premiered at the Sundance Film Festival in 2011.