Filming started this month in Atlanta. American actress Brittany Snow, of Hairspray and television series American Dreams fame, has been cast as a journalist who follows the two men as they work on the case.
Earlier this year, Urban told the Herald on Sunday he was honoured to be working alongside someone who was considered one of the greats of the acting world.
"I am very much looking forward to shooting Hangman and working together with Al.
"I have immense respect for his ability and craft,'' Urban said.
"Pacino is one of the greats. He has phenomenal instincts and his contribution to stage and screen is truly inspirational.''
Urban has long been a household name in New Zealand, having appeared on local soap Shortland Street (as ambulance officer Jamie Forrest) in the early years of his career.
He also starred in television series hits Xena: Warrior Princess and Hercules: The Legendary Journeys, before getting his break in bigger films including The Chronicles of Riddick and Star Trek.