Marta is a student at Horace Green Prep School and is a member of the class that that Dewey Finn starts teaching as a substitute teacher under the name of Ned Schneebly. She is one of the three backup singers for the band. Marta is a pretty young girl, known for having long hair in twin plaits. She is played by Caitlin Hale. Marta is called blondie thoughout the movie. She has the highest voice of the three singers. She is very short.