[UPDATE 2] Insomniac has now confirmed that the new Ratchet & Clank game for PS4 has also been delayed to 2016. Get the full story here.

[UPDATE] We now know the roles Paul Giamatti, John Goodman, and Sylvester Stallone--among others--will play in the upcoming movie. See below. We've also confirmed that the movie is now scheduled to launch in 2016, a delay from its original 2015 release window. What we don't know, at least not yet, is if the Ratchet & Clank remake for PlayStation 4--which is supposed to launch in the first half of 2015--is also delayed.

Paul Giamatti -- Chairman Drek

John Goodman -- Grimroth

Bella Thorne -- Cora

Rosario Dawson -- Elaris

Sylvester Stallone -- Victor

The original story is below

The voice cast for the upcoming animated Ratchet & Clank movie has been revealed.

According to The Hollywood Reporter, household names like Paul Giamatti, John Goodman, and Sylvester Stallone will star in the film, along with Rosario Dawson and Bella Thorne. Their roles have not been announced, however.

Meanwhile, Ratchet & Clank video game voice actors James Arnold Taylor (Ratchet), David Kaye (Clank), Armin Shimerman (Nefarious), and Jim Ward (Captain Qwark) will also lend their voices to the movie.

The Ratchet & Clank movie follows Ratchet and Clank as they attempt to thwart the plans of an evil alien named Chairman Drek.

"When the duo stumble upon a dangerous weapon capable of destroying entire planets, they must join forces with a team a group called The Galactic Rangers in order to save the galaxy," reads a line from the movie's description.

Presumably, Giamatti, Goodman, Stallone, Dawson, and Thorne will voice The Galactic Rangers.

Directing the Ratchet & Clank movie is Kevin Munroe, who directed 2007's TMNT. The film is being developed by production companies Rainmaker Entertainment and Blockade Entertainment, alongside PlayStation and Insomniac Games.

Insomniac will have a "hands-on role" in the film's production, screenplay, character development, and animation consulting. In addition, Ratchet & Clank writer T.J. Fixman--who has written every Ratchet & Clank game--will pen the script for the film.

The movie is scheduled to hit theaters in 2016, a delay from its original 2015 release window.

In addition to the Ratchet & Clank movie, Insomniac has announced a new Ratchet & Clank game for PlayStation 4. It's a remake of the 2002 PlayStation 2 original, and will have "new visuals that rival the best PS4 games on the market."