Bob Balaban plays Dr. Theodore W. Millbank, III, a neurotic and socially awkward psychiatrist involved with the dog show.
Jennifer Coolidge portrays Sherri Ann Cabot, a wealthy and slightly clueless socialite competing in the dog show with her poodle.
Christopher Guest embodies the role of Harlan Pepper, a mild-mannered and quirky rural fisherman who enters the competition with his bloodhound.
John Michael Higgins portrays Scott Donlan, a flamboyant and enthusiastic gay dog handler committed to winning the show with his partner.
Michael Hitchcock plays Hamilton Swan, a meticulous and serious lawyer who competes in the dog show with his equally driven wife.
Eugene Levy embodies the role of Gerry Fleck, an endearing and well-meaning travel agent who is devoted to his prized Norwich Terrier.
Jane Lynch portrays Christy Cummings, a confident and assertive lesbian dog trainer who aspires to win the dog show with her Shih Tzu.
Michael McKean plays the role of Stefan Vanderhoof, an artsy and eccentric dog lover who competes in the show with his equally artistic partner.
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