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The chihuahua who played Bruiser was named Moonie. He died on March 10, 2016 at the age of eighteen.
A perfect score on the LSAT exam is 180, therefore Elle's score of 179 puts her in the top 0.1 percent.
Elle Woods was named after Elle Magazine. Amanda Brown, author of "Legally Blonde", the novel on which this movie was based, spent her time at Stanford Law School reading copies of Elle Magazine.
During the opening credits, a group of (mostly) guys is seen wrestling on a lawn in front of a fraternity house. These folks are actual Caltech students, and were a last-second addition to this scene: they showed up on the set (the row of fraternity and sorority houses featured are administrative buildings on the edge of Caltech's campus) unannounced and were invited to join in the filming.