William Atherton cast on 'Lost'

"Die Hard" and "Ghostbusters" star William Atherton will have a guest starring role on the final season of ABC's "Lost."

Executive producer Carlton Cuse revealed the casting in a series of Tweets last night:

“Damon & I are die hard fans of this impeckable actor who keeps the bar high and just signed to guest star. Life is good!” he wrote ....  then added that “yes it is a clue"...

Fan guesses ranged from Bruce Willis to Rosanne Barr.

Atherton played the memorably douche-y "Walter Peck" in "Ghostbusters" and similarly douche-y "Dick Thornburg" in "Die Hard" (the 1980s weren't very subtle with character names, were they?). He also had a recurring role on "Life."