Earlier this month, we told you that Olivia Wilde (TRON: Legacy, Cowboys & Aliens) had joined the cast of Andrew Niccol‘s upcoming, untitled sci-fi film (formerly titled, I’m.mortal). Previously, Cillian Murphy (The Dark Knight, Inception), Amanda Seyfried (Red Riding Hood) Vincent Kartheiser (Mad Men) and Collins Pennie (Hawthorne) had joined the cast alongside Justin Timberlake (The Social Network).

Now, Deadline reports that Johnny Galecki (The Big Bang Theory) has joined the cast of Niccol’s as yet Untitled Justin Timberlake/Amanda Seyfried Thriller. The actor will be playing the best friend of Timberlake’s character.

The film is set in a society where time is the new currency, the rich are essentially immortal and the rest of society has to struggle to survive. Cillian Murphy will be playing a member of the law enforcement organization known as the Timekeepers. Justin Timberlake will play a man who goes on the run, and takes an heiress (Amanda Seyfried) hostage after he comes into a fortune of “time” and becomes the target for a murder investigation. Vincent Kartheiser will play Seyfried’s father, Collins Pennie will play the right-hand man of Murphy’s character, and Olivia Wilde will play Timberlake‘s mother.

[Update: November 1st]
Alex Pettyfer (I Am Number Four) and Matt Bomer (Chuck, White Collar) have both joined the cast in as-yet unknown starring roles, and the film has been re-titled to the very simple one word moniker of NOW.

NOW is slated to hit theaters on October 28th, 2011.