This article has not been given a name, as such, the name Leonard's Owner, is purely conjectural.
|Appearance||Male in business suit|
|Debut||The Secret Life of Pets|
|Voiced by||John Kassir|
Leonard's owner wears a dark-blue two-piece business suit and a light blue shirt. He lives in a posh and lavishly furnished apartment, suggesting his rich status.
Leonard's owner is fond of classical music and trusts Leonard well enough to leave him alone in the house.
Leonard's owner lives in his New York apartment with his only pet Leonard. When he puts on some classical music and leaves the flat to go to work in the morning, Leonard invites pets and stray animals for parties and blasts heavy metal music without his knowledge. When he returns to the house, he discovers a pig within the falling chandelier to his surprise.
- In The Secret Life of Pets, he is the only known partially-seen character that is the owner of a notable pet.
|Buddy • Chloe • Duke • Gidget • Max • Mel • Norman • Pops • Sweetpea • Tiberius|
|The Flushed Pets|
|Derick • Dragon • Nitro • Ozone • Password Snakes • Ricky † • Ripper • Snowball • Tattoo • The Alley Cats • The Sea-Monkeys • Viper †|
|Dummy • Gino • Guillermo's Iguana • Leonard • Marilyn's Cat • Myron • Peanut • Pepe • Reginald • Runty • Shelly • The Boston Terrier • The Collie • The Golden Retriever • The Papillon|
|Fernando • Maria • The Piranha • The Sausages (Frank • Timmy) • The Squirrels • The Pigeons • Unnamed Chihuahua|
|Animal Control (Fourrage • Menard) • Buddy's Owners • Chloe's Owner • Fred † • Harold • Germo • Germo's Girlfriend • Gidget's Owners • Gino's Owners • Guillermo • Guillermo's Girlfriend • Katie • Katie's Grandma • Leonard's Owner • Marilyn • Mel's Owner • Molly • Norman's Owner • Pepe's Owner • Reginald's Owners • Steve Cabin • Sweetpea's Owner • Tiberius' Owner|