She performed in a band called Wardell (previously known as Brother/Sister), with her brother Theo. Their Brother/Sister EP, The Accidental Zoo, was released April 4, 2011. Their album Love/Idleness was released in 2015.
In 2015, Spielberg produced, wrote for, and starred in Snapchat's first mobile series, Literally Can't Even. She also shares her mini-improv sketches on Instagram. On April 27, 2018, she released her solo EP Facepaint, with 5 songs.