Subject of this thesis is specificity of adapting animated fairy tale compared to literary source material. The aim of the thesis was to analyze the adaptation of an animated film based on a literary source material. Two fairy tales were compared with their animated versions in this study. The first part of the thesis explains the definition of a fairy tale and an animated film. General characteristics and characters in fairy tales are highlighted. The classification of fairy tales is presented, along with some of the most famous fairy tale authors. Filmic expressive means, film genres, and types of animation are defined and described. The focus of this thesis is on the analysis and comparison of the literary source material and the animated film. In the second part of the thesis, two fairy tales and their animated films are analyzed. "Beauty and the Beast" and "Aladdin" are examined. General characteristics of fairy tales and animated films are highlighted. A summary of the animated film and the literary source material is provided, along with descriptions of characters and main features. Then, the main differences in the realization of the animated film with respect to the literary source material are emphasized.