Beethoven’s 4th

Wealthy, status-obsessed head of the Sedgewick family who treats life as a sequence of social performances. He is driven by business and appearances, often neglecting his daughter Madison in favor of maintaining a polished image. His practical, controlling nature sets up the family dynamic that Beethoven disrupts with comic chaos.

Martha is preoccupied with prestige and her own comfort, prioritizing appearances over genuine connections. She is quick to defend the fashionable image of her family but is shown to be emotionally distant from Madison. Through the dog chaos, she is forced to confront the consequences of neglect and self-interest.

A lonely, neglected girl who craves attention and friendship. She forms a tentative bond with the dogs, showing a softer, more hopeful side beneath her parents' preoccupations. Her interactions with Beethoven and Michelangelo reveal her longing for care and companionship.

The caring, practical father who loves Beethoven and tries to balance family life with work pressures. He often acts out to test or reconnect with the dog’s energy, illustrating a relatable desire to protect his kids and diffuse tension. His relationship with Sara and Brennan anchors the Newtons’ side of the story.

A kind-hearted sister who bonds with Beethoven and fuels much of the plot through her empathy and determination. She helps navigate the dog’s double life and supports her family as chaos erupts. Her agency shows through her care for the dog and her siblings.

An energetic, curious younger brother who triggers mischief and helps drive the comedy. He connects with Hayley and participates in the dog-related adventures that ultimately reveal deeper family dynamics. Brennan’s enthusiasm contrasts with the more measured adults.

The Sedgewick family’s butler with a sharp eye for opportunity, whose scheming adds tension to the plot. He is involved in the dog swap and the scheme that drives the ransom subplot. His actions test the line between loyalty and self-interest.

A heist-driven antagonist who kidnaps Beethoven to demand a ransom. He represents a comic villain whose greed triggers the climax. His plan directly challenges the Newtons and Sedgewicks to protect the dogs and their families.

An army sergeant-turned-obedience trainer who showcases discipline and order, serving as a catalyst for Beethoven’s impressive performance. He embodies the comedic tension between strict training and the dogs' unpredictable nature.

The beloved St. Bernard around whom the chaos revolves. His good-natured, resilient behavior drives most of the plot points and tests the patience and affection of both families. Beethoven’s actions illuminate themes of loyalty and belonging.

A pampered look-alike St. Bernard who creates confusion by resembling Beethoven. He serves as a foil to Beethoven and adds complications when the two dogs are mistaken for one another. His antics escalate the tension of the obedience competition and the ransom subplot.