The former "Deadwood" star looks set to join already announced cast members Leonardo DiCaprio, Brad Pitt, Margot Robbie, Burt Reynolds, Tim Roth, Kurt Russell, and Michael Madsen in a film set in 1969 Los Angeles during the infamous Manson murders.
DiCaprio and Pitt will star as an ex-TV star and his stunt double, one of whom lives next door to Sharon Tate. (Robbie will be playing the tragically murdered actress.)
Olyphant currently costars on Netflix's "Santa Clarita Diet:" A schedule has reportedly been worked out as the Netflix zombie comedy was just renewed for a third season.
It's not clear what role Olyphant will be playing in the new QT epic, but we're there whether it's a gun-toting lawman (as in "Justified") or knife-wielding maniac (à la "Scream 2").