A little mouse got an elephant-sized party Sunday as Sony Pictures took over two theaters in Westwood plus a whole block to usher in “Stuart Little 2.”

The event raised money for the Juvenile Diabetes Research Foundation Intl., Children’s Hospital of Los Angeles and CuresNow, an org that promotes regenerative medicine research.

Before the film unspooled, producers Douglas Wick and Lucy Fisher spoke movingly about how juvenile diabetes has affected their lives (one of their daughters has the disease).

Columbia chairman Amy Pascal confirmed there will be a “Stuart Little 3,” noting there’s “a lot to work with” in the franchise.

Tim Sarnoff, G.M. of f/x house Imageworks, said the visual challenges of the film motivated his crew, including the 25 artists who focused on the title character.

“We’re most proud of the animation in this film,” he said. “It’s more complicated to make kids (just) see the characters. To the animators, Stuart is real.”

Human star Geena Davis found it easier to work with a “blue dot” in place of an actor this time around.

“I knew what Stuart looks like,” she said. “In the first movie, I didn’t know what he looked like, so I asked Doug Wick, ‘Can you please make him look good, because I’m pouring my heart out here.'”

Also on hand to enjoy the carnival were “Stuart” stars Michael J. Fox, Nathan Lane, Melanie Griffith, Jonathan Lipnicki and Marc John Jeffries, exec producers Jason Clark and Gail Lyon, Sony execs Jeff Blake, Geoffrey Ammer and Peter Schlessel, and guests Nancy Reagan, Leeza Gibbons, Lisa Rinna, Harry Hamlin and Michael Chiklis.

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