Urban and Ms Wihongi, who was his makeup artist on TV movie The Privateers, have two sons.
The Wellington-born actor has starred in a handful of blockbusters, including the second and third instalments of Peter Jackson's The Lord of the Rings trilogy, The Bourne Supremacy alongside Matt Damon, 2012's Dredd as the title character, and two Star Trek films.
Early in his career he played Shortland Street paramedic Jamie Forrest and starred in Xena: Warrior Princess, alongside Lucy Lawless, and Hercules: The Legendary Journeys, alongside Kevin Sorbo.