This essay examines how nineteenth-century American literature paved the way for the modern exposure of private life in such disparate venues as the gossip column, social media, and reality television. In particular, this essay examines the sketch form, a popular nineteenth-century prose genre that has often been characterized as a minor form in comparison to the novel. In examining the history of the sketch form, this essay shows how the sketch conveyed reservations about the interiority and exposures central to the novel form. As practiced by Washington Irving, the earliest popularizer of this genre, the sketch advocated respectful discretion, the avoidance of private matters, and social stasis, the latter of which positioned the sketch in opposition to the social mobility characteristic of the novel. Irving presented the sketch as the genre of literary discretion, but its latter practitioner, Nathaniel Parker Willis, used the sketch to divulge confidences and violate social decorum. Willis adapted the sketch to become a precursor of the gossip column and to mirror the novel form in exposing private life.