Cuse, who had previously used a shortlist of code names for the season's final scene, wrote clues about the actor for fans of the series to figure out on Tuesday, TV Guide reports.
"Damon and I are die hard fans of this impeckable actor who keeps the barr high and just signed to guest star on the show. Life is good! [sic]" he wrote.
Some of the misspellings in his message were actually hints that William Atherton had been cast on the programme, while others referred to his movie and television work.
The 62-year-old appeared in the first two Die Hard movies. He played Walter Peck in Ghostbusters and Dr Barr on Desperate Housewives, as well as appearing in police drama Life.
The name and description of his character are currently unknown.