Michael Gambon leaves Hogwarts for the post-apocalyptic Eli

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Dec 14, 2012, 3:54 PM EST

Michael Gambon (Dumbledore in the Harry Potter movies) is joining the cast of The Book of Eli, a post-apocalyptic sci-fi movie starring Denzel Washington and Gary Oldman, according to The Hollywood Reporter. Allen and Albert Hughes are directing.

Gambon will play one half of a strange couple that holds onto old traditions in the futuristic tale, the trade paper reported.

Warner Brothers-based Alcon Entertainment and Silver Pictures are co-producing the film, which Warner will release domestically Jan. 15, 2010.

Washington will play a lone warrior traveling across a wasteland version of America in the not-too-distant future. The original story is written by Gary Whitta, with a rewrite by Anthony Peckham.