Heather O'Neill is a novelist, poet, short-story writer, screenwriter, and essayist. Lullabies for Little Criminals, her debut novel, was published in 2007 to international critical acclaim and was shortlisted for the Orange Prize for Fiction.

Her second novel, The Girl who was Saturday Night, was longlisted for the Baileys Women's Fiction Prize, and shortlisted for the Giller Prize, as was her collection of short stories, Daydreams of Angels.

Her third novel, The Lonely Hearts Hotel was longlisted for the Baileys prize. Born and raised in Montreal, O'Neill lives there today with her daughter.