Lady and the Tramp is a 1955 American animated musical romance film produced by Walt Disney and released by Buena Vista Film Distribution. The 15th Disney animated feature film was directed by Clyde Geronimi, Wilfred Jackson, and Hamilton Luske, and features the voices of Barbara Luddy, Larry Roberts, Bill Thompson, Bill Baucom, Verna Felton, and Peggy Lee. The film was based on the 1945 Cosmopolitan magazine story "Happy Dan, The Cynical Dog" by Ward Greene, and tells the story of Lady the pampered Cocker Spaniel as she grows from a puppy to adult, deals with changes in her family, and meets and falls in love with Tramp the homeless mutt.

Source: Wikipedia