XXX star Vin Diesel is doubling up his efforts to play Cathaginian leader HANNIBAL - he'll also voice the historical hero in a new TV cartoon series. The movie star has been working on the ambitious project - following the journey the ancient soldier's army made on the back of elephants over the Alps - for years, and now he'll get two chances to play Hannibal. He'll also play the legendary general in new animated TV series HANNIBAL THE CONQUEROR, which is set to air on US cable network BET in 2007.