Jack McClane is all grown up!

In 2013's "A Good Day to Die Hard," Bruce Willis' John McClane is reunited with his son -- the first time we've seen the character since 1998, when he was just a child in the original "Die Hard."

This time around Jack is played by Aussie actor Jai Courtney, who's most well-known for his role Varro in "Spartacus: Blood and Sand."

"It's been a lot of fun," Jai says of working with Bruce on the new flick, which hits theaters February 7, 2013.

"The relationship between Jack and John has been estranged for the last few years," Courtney explains. "Jack is working for the CIA, deep cover. They lock horns, they butt heads, it's been great."

Though we still have a few months to wait until the movie lands in theaters, we've got a sneak peek of Bruce and Jai in action above!

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