The classic movie girl played by a boy is LASSIE. LASSIE is a fictional character created by Eric Knight in a short story that was later adapted into a novel and then into a movie. The character of LASSIE is a Rough Collie dog who is loyal and brave, and is often used to represent the bond between humans and animals. The character has been featured in numerous films, television shows, books, and other media. The most famous portrayal of LASSIE was in the 1943 film LASSIE Come Home, where she was played by a young male actor named Roddy McDowall.