In the movie, "Rocky", what is the name of Rocky's dog?

In the movie “Rocky,” Rocky Balboa’s dog is named Butkus.

Butkus is a large bullmastiff who appears in Rocky’s Philadelphia home and during several personal moments in the 1976 film. The dog is part of Rocky’s life before his boxing career suddenly becomes famous, helping establish the character’s modest, working-class world.

A notable behind-the-scenes detail is that Butkus was also Sylvester Stallone’s real-life dog. Stallone included him in the film, making Butkus one of the movie’s most personal touches. The dog is sometimes mistakenly described as a bulldog or simply as a mastiff, but bullmastiff is the more precise breed identification.

Viewers may also remember Butkus from discussions of the Philadelphia Museum of Art training sequence. Stallone once considered having Rocky carry his dog up the steps, but Butkus was too heavy for that idea to work. The famous staircase scene therefore ends with Rocky celebrating alone.