Breaking just one week after the debut of the film’s first trailer is the news (arriving today via Deadline) that Paramount Pictures has added the voice talents of both Johnny Knoxville (Jackass Presents: Bad Grandpa, The Last Stand) and Tony Shalhoub (“Monk,” Pain & Gain) to the cast of Teenage Mutant Ninja Turtles. Knoxville will voice Leonardo while Shalhoub will be providing the voice of Master Splinter. The characters are performed by Pete Ploszek and Danny Woodburn, respectively.

In the movie, also set to star Megan Fox, Alan Ritchson, Jeremy Howard, Noel Fisher, Will Arnett and William Fichtner, darkness has settled over New York City as Shredder and his evil Foot Clan have an iron grip on everything from the police to the politicians. The future is grim until four unlikely outcast brothers rise from the sewers and discover their destiny as Teenage Mutant Ninja Turtles. The Turtles must work with fearless reporter April O’Neil (Fox) and her wise-cracking cameraman Vern Fenwick (Arnett) to save the city and unravel Shredder’s diabolical plan.

Directed by Jonathan Liebesman, Teenage Mutant Ninja Turtles hits the big screen August 8.

(Photo Credit: Adriana M. Barraza / Nikki Nelson / WENN.com)

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