It's Cole Hauser. Even if you don't recognize his name, you've no doubt seen Hauser before. He played a stalwart football player in Dazed and Confused, an interstellar bounty hunter in Pitch Black, a movie star who has had enough in Paparrazi, and a member of the Bostonian gang in Good Will Hunting. This will actually be his third film with Bruce Willis, having lent support to the erstwhile Bruno in Tears of the Sun and Hart's War.
According to Deadline, the role is a villain who goes by the name of Collins. We don't yet know if Hauser's character is the principal antagonist, in which case he would join a list of Die Hard villains from Alan Rickman to Timothy Olyphant. Based on the description of Collins as "a pivotal supporting role," Hauser might be a henchman or something, but it does seem odd that we've yet to hear just who will be getting yipee-ki-yay'ed.
Since every Die Hard entry has exponentially expanded the scope beyond the original film's Nakatomi Plaza and Live Free or Die Hard featured a national struggle, this sequel takes John McClane global. The cigarette-smoking, wisecracking, vulnerable hero has gradually morphed into a stoic, indestructible, action-beast will team up with his son John "Jack" McClane, as the duo become the most wanted men in Russia.
Earlier this year, Jai Courtney won the role of John Jr., who's said to have grown into an ass-kicker like his pops in the 24 years since we saw him as a little boy in Die Hard.
John Moore, the regular Fox helmer responsible for Max Payne, Behind Enemy Lines, and The Omen remake, is directing the film. He's working from a screenplay by Skip Woods, whose credits include Swordfish, Hitman, and X-Men Origins: Wolverine.
A Good Day to Die Hard is scheduled to hit theaters on February 14, 2013.