'Do you solemnly swear...?' Keanu Reeves is on the case as defense attorney Richard Ramsay in the Lionsgate Premiere thriller The Whole Truth. Starring Reeves alongside Renée Zellweger, Gugu Mbatha-Raw, Gabriel Basso and Jim Belushi, the chilling crime thriller arrives in theaters and on-demand this October 21st! Today, we have the powerful new trailer, which arrives along with the first domestic poster.

Defense attorney Richard Ramsay (Keanu Reeves) takes on a personal case when he swears to his widowed friend, Loretta Lassiter (Renée Zellweger), that he will keep her son Mike (Gabriel Basso) out of prison. Charged with murdering his father, Mike initially confesses to the crime. But as the trial proceeds, chilling evidence about the kind of man that Boone Lassiter (Jim Belushi) really was comes to light.

While Ramsay uses the evidence to get his client acquitted, his new colleague Janelle (Gugu Mbatha-Raw) tries to dig deeper. And he begins to realize that the whole truth is something she alone can uncover. The Whole Truth will be released by Lionsgate Premiere and it will be available in theaters and On Demand October 21, 2016.

RELATED: Keanu Reeves Replaces Daniel Craig in The Whole Truth

Courtney Hunt directs The Whole Truth from a screenplay by Rafael Jackson. Courtney Hunt first found wide spread acclaim for her 2008 thriller Frozen River, starring Melissa Leo in a tale about border smuggling. The movie marks the first time Keanu Reeves and Renee Zellweger have worked together on screen. Sean Bridgers, Christopher Berry, Ritchie Montgomery and Nicole Barré round out the cast.

The Whole Truth arrives on one of the busiest release dates of the year. It will have some fierce competition at the box office as it goes up against the Tom Cruise sequel Jack Reacher: Never Go Back as well as the comedy thriller Keeping Up with the Joneses starring Jon Hamm, Zack Galifianakis and Gal Gadot. Universal will be releasing the horror sequel Ouija: Origin of Evikl, which is currently garnering a lot of genre buzz for taking the franchise in a wild new direction. And Tyler Perry will be celebrating the holiday season with Boo! A Madea Halloween. But if you're into courtroom drama, The Whole Truth will be the movie for you. Check out the first trailer courtesy of Lionsgate Premiere.

<strong><em>The Whole Truth</em></strong> Poster
B. Alan Orange at Movieweb
B. Alan Orange