Which Disney animated film was the first to be filmed in CinemaScope?

Lady and the Tramp was the first Disney animated film to be filmed in CinemaScope. The 1955 feature began production in the standard Academy ratio, but Disney switched it to the widescreen process partway through production.

CinemaScope used special lenses to compress a wide image during filming and expand it during projection. That wider frame created new challenges for Disney artists: characters had to be arranged across a broader field, and backgrounds and staging needed more careful planning.

The film was not Disney’s first CinemaScope animation of any kind. The short Toot, Whistle, Plunk and Boom had already used the process in 1953. Lady and the Tramp was instead the first full-length Disney animated feature filmed in CinemaScope.

Because many theaters still lacked compatible projection equipment in 1955, Disney prepared both a widescreen CinemaScope version and a narrower Academy-ratio version. The film was released on June 22, 1955, and its visual design helped establish widescreen presentation as an important feature-animation option.