The upcoming Teenage Mutant Ninja Turtles reboot from producer Michael Bay and director Jonathan Liebesman just got a little more star-studded. Johnny Knoxville has signed on to lend his voice to the katana-wielding Leonardo, while Tony Shalhoub will lend his voice to the role of the Turtles’ giant rat sensei, Splinter, according to Deadline.
The roles were filled during filming by Pete Ploszek as Leonardo and Danny Woodburn as Splinter, but both were hired with the understanding that their voices may be replaced. The news comes after the release of the film’s first trailer, which shows off the massive mutant turtles, but only hints at their voices. It also never shows even a glimpse of Splinter.
There may be more voice casting announced in the coming weeks. With the film hitting theaters on August 8, 2014, it would need to be announced soon.