Warner Brothers' Batman Begins sequel The Dark Knight has just added two more members to its cast. According to Variety, Melinda McGraw and Nathan Gamble will now be appearing alongside the caped crusader.

In the film, McGraw will be playing wife of Lt. Gordon, portrayed in the film by Gary Oldman. Gamble will be playing their son. The plot follows Batman and Gordon as they team up with a newly appointed DA, Harvey Dent. Together, they try to stop a vicious killer with a warped sense of humor known only as The Joker. He is apparently a threat to both the good, and the evil of Gotham City.

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Chris Nolan returns to direct the film. It is currently shooting in both Chicago and London. The film opens July 18th, 2008.