Chinese actress Zhang Ziyi is improving her spoken English to voice the role in the cartoon film [file photo: CRIonline]

Chinese actress Zhang Ziyi will reportedly provide her voice for the Hollywood computer-graphics-laden movie "Teenage Mutant Ninja Turtles." 　

Zhang is reportedly among four celebrities, including Sarah Michelle Gellar, director Kevin Smith and film star Chris Evans, who recently have signed to lend voices for minor roles for this TV cartoon-turned-film. 　　

Zhang will voice evil minion Karai in this Kevin Monroe-helmed production, with famed "Clerks" director Kevin and Evans lending their voices to a cook and vigilante Casey Jones respectively. 　　

The lead turtle roles will all feature voices of non-celebrities.