Back in December, Paul Dano (For Ellen, Cowboys & Aliens) had joined the cast of writer/director Rian Johnson‘s (Breaking Bad, Terriers) upcoming film, Looper. Dano joined a cast which already included Bruce Willis, Joseph Gordon-Levitt, and Emily Blunt.

Now, Variety reports that Jeff Daniels (Howl), Piper Perabo (Covert Affairs), and Noah Segan (All About Evil) have joined the cast as well. Their roles are unknown at this time.

In other Looper news… director Rain Johnson has taken to twitter to announce that Primer writer-director-producer-actor-production designer Shane Carruth [Below] is joining the production as well.

Johnson said,

“Shane Carruth is working on Looper. If you haven’t seen his film Primer, run don’t walk…He’s doing FX work.”

Looper is a sci-fi/time-travel thriller that follows a group of killers who send their victims’ dead bodies back in time. Joseph Gordon-Levitt (Inception) and Bruce Willis (Surrogates) who play the same character, in different time frames. Emily Blunt (The Adjustment Bureau) will portray a single mother whose son becomes a target, and she goes to great lengths to protect him.

Looper is slated to hit theaters in 2011.