In 2015, writer, comedian and actor Rebel Wilson was at the centre of an exposé, courtesy of what she called 'the shady Australian press'. Thrown into question were her birth name, age, upbringing and education - and, curiously, her authentic funniness, as if this too could be retracted retrospectively despite scene stealing turns in Hollywood comedies. In light of Wilson's vindication, due to a clear win in her 2017 defamation case against Bauer Media, this article examines the preceding fallout for the actor. I argue that this case offers more than just another example of the authentic/inauthentic binary imposed upon celebrities, grounded as it is in a complex combination of Wilson's gender, nationhood and contested comic turf. In drawing from Wilson's work for broadcast, and in her capacities as both creator and star, I explore the interplay between those characters and the alleged falsehoods in her background. Situating Wilson in the tradition of comedian comedy, and exploring available parallels in the scholarship on Melissa McCarthy and Roseanne Barr, I track an emerging and possibly strategic separation in Wilson's public and comic personas, arguing that this offers a clear illustration of the ways female comedians must navigate their celebrity and 'authenticity'.