A cartoonist and illustrator from Austin, TX born in 1996. Tillie's first book was published at the age of 18 by UK publishers Avery Hill. She has since made two further books with them, been nominated for an Eisner and won two Ignatz Awards. All in the space of 18 months.

A graduate of the Center for Cartoon Studies, Tillie likes cats, architecture, daylight and manga. She doesn't like flowers, nighttime, loud music, or superhero comics.

Her first major autobiographical graphic novel came out from First Second in Fall 2017.