Sherlock Holmes viral marketing campaign begins

Warner Brothers Pictures has launched a viral campaign for the Guy Ritchie-directed Sherlock Holmes, starring Robert Downey Jr., Jude Law, Rachel McAdams, Mark Strong, Eddie Marsan and Kelly Reilly, reported.

Check out the viral site here. To access the site, type "IRENE" (for Rachel McAdams' character, Irene Adler) in the boxes and you'll then be taken to a video of a hooded man, followed by a page where you can register your email address to receive further updates.

The mystery action adventure opens in theaters on Christmas Day.

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