"Die Hard: Family Reunion"

So not only is John McClane's son, played by Jai Courtney, appearing in the fifth "Die Hard" film, but his daughter from the last film, Lucy McClane, played by the very beautiful Mary Elizabeth Winstead, will be making a cameo in the film too.
An extra in the film confirmed this online, "I got to work with Bruce Willis again, which is always nice. The best, though, was that I got to work with Mary Elizabeth Winstead, who plays Willis' daughter."