R2-KT started off as a real-world replica of an R2-series astromech droid with pink highlights. Albin Johnson, the founder of the 501st Legion, wanted to build a pink droid for his daughter Katie, who was dying from brain cancer (In fact, the "KT" suffix would appear to be a reference to her name). When it was realized that he did not have enough time, R2-KT was built by Jerry Greene, master droid builder, with the help of the R2 Builders Club. R2-KT makes appearances at children's hospitals, Star Wars Celebration and charity events in the southeastern United States. A Hasbro action figure of this droid was sold at San Diego Comic-Con 2007 and the character had a cameo in the Star Wars: The Clone Wars film.
R2-KT was originally going to appear in the Clone Wars episodes "Secret Weapons" and "A Sunny Day in the Void". However, since those episodes featured several droids as main characters, the Clone Wars crew wanted to avoid audience confusion with R2-D2, so they created the droid QT-KT instead.[2]