Mad Men's Vincent Kartheiser has boarded writer/director Andrew Niccol's untitled Justin Timberlake-Amanda Seyfried thriller, previously known as I'm.mortal, about a society where no one ages beyond 25, except for those rich enough to buy time.

According to Variety, Cillian Murphy also stars in film. Vincent Kartheiser plays the father of Amanda Seyfried's character, who is forced to choose between the daughter he loves and the oppressive time system that has made him rich.

Also joining the cast is Collins Pennie. He plays right-hand man to Timekeeper Raymond Leon (Murphy).

The storyline follows a rebel from the ghetto (Justin Timberlake) who is falsely accused of murdering a wealthy man for his time, and goes on the run with a beautiful hostage (Amanda Seyfried).

New Regency picked up the high-priority project last spring.