12 Times Actors Appeared On A Show Despite Being Established In-Universe

There are countless examples of actors being established as existing within a TV show’s narrative, only for the stars to later join the series’ cast as a separate character. Television shows have indulged in this type of celebrity paradox for decades, with examples continuing to grow as a celebrity’s presence becomes narratively illogical. Not only do the appearances of established celebrities as someone other themselves break the fabric of the show’s universe, but it can occasionally also create plot holes and story issues.