Autofiction and theories of fiction seem to be at odds. Whereas the notion of autofiction capitalizes on a postmodern consensus regarding the fictional status of self-narration, recent theoretical approaches to fiction and fictionality have reaffirmed the distinction between fictional and nonfictional narratives. It is possible to move beyond this impasse, however, by drawing on narratological and rhetorical theories of fictionality to describe the precise forms and degrees of fictionality and fictionalization discernable in works received as autofiction. Different configurations of the fact/fiction relationship can produce various autofictional effects, and theory can help us locate sites of fictionalization and factualization within literary works. Conversely, the ambiguity and hybridity of autofictional texts serve as a useful empirical testing ground for theories of fiction and fictionality.