In an e-mail to supporters, Christie says a formal announcement will come in the first week in February.
The filing allows Christie to start raising money for the 2009 race.
The 46-year-old Republican with a reputation as a corruption-busting prosecutor has been flirting with a gubernatorial bid since resigning as U.S. Attorney Dec. 1.
Christie faces a primary challenge from state Assemblyman Rick Merkt and former Bogota Mayor Steve Lonegan.
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The Giants and Jets football teams will have a new home next season. Check out these photographs of taken over the new stadium in the Meadowlands in East Rutherford, NJ by Tom Kaminski in Chopper 880 on Monday, November 23, 2009.