Authenticity is often described using terms like “real,” “genuine,” and “true” suggesting that unbiased and objective self-perception is a core component of the construct. However, people tend to view themselves in an overly positive way. Therefore, we propose that experiencing a positive self—versus an unbiased self—will increase authenticity. We find support for this in seven studies (Ntotal = 1,795) with two operationalizations of self-rated authenticity: attributed and state authenticity. We find that authenticity emerges from positive self-beliefs (Study 1), positive personality assessments (Study 2), and positive self-expressions (Study 3a and b). Further, we find that these effects are not driven only by positivity, but positive selves (Study 4), and mediated by the identity centrality (Study 5). Finally, Study 6 finds that this positivity bias does not extend to other-rated authenticity: People who present an overly positive self seem less authentic to others relative to a mixed or negative self-presentation. Taken together, these findings suggest that being “unreal” through positive self-illusions can, paradoxically, make one feel more real.