Sarah Blue
- Birthday: 4/13/1983
- Place of birth: Prague, Czechoslovakia [now Czech Republic]
- Fame for: Acting
- Also known as: Sarah B, Katerina B., Katy B., Sara Blue, Katerina Blumelova, Blumelove, Katerina Blumelová, Katerina, Kathy, Katja, Katka, Katra, Katrina, Katy, Kat, Kellie, Martina, Monika, Sarah, Cathy