<Li> Catherine Keener as Sally Jackson, Percy's mother </Li> <Li> Joe Pantoliano as Gabe Ugliano, Percy's stepfather </Li> <P> In June 2004, 20th Century Fox acquired feature film rights to the book . In April 2007, director Chris Columbus was hired to helm the project . Filming began in April 2009 in Vancouver . Portions of the film were shot at the Parthenon in Nashville, Tennessee, that has a full - scale replica of the original Parthenon in Athens . Filming wrapped up on the morning of July 25, 2009, in Mission, British Columbia . Additional exterior scenes were filmed on location in Brooklyn, New York during the first week of August 2009 . Digital intermediate work began in San Francisco in November 2009 . Christophe Beck composed the score . Columbus has stated that the cast was chosen specifically with sequels in mind . "I think with Percy Jackson it was a matter of finding the right cast to fit into these roles, sort of the perfect cast for these roles, because hopefully, God willing, we will go on to do other Percy Jackson films and you want the cast to grow with their characters". </P> <P> The film opened on February 12, 2010, in 3,356 theaters; its opening weekend box - office results totaled $31,236,067 in the U.S., finishing at #3 below The Wolfman, which opened at #2 with $31,479,235 and below Valentine's Day, which opened at #1 with $56,260,707 . The film had a strong opening weekend for its genre, posting the highest opening weekend for a fantasy film not from the Harry Potter, Chronicles of Narnia, or Lord of the Rings series . As of September 14, 2010, it grossed a domestic total of $88,768,303 with $137,728,906 elsewhere in the world, bringing it to $226,497,209 . </P>

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