Claudia Christian is an American actress, singer, and author, known for her roles as Commander Susan Ivanova on Babylon 5, as Captain Maynard on Fox's 9-1-1, and as the voice of Hera on the Netflix series Blood of Zeus. She is also the voice of Lt. Helga Sinclair in Atlantis: The Lost Empire. She is the founder and CEO of the C Three Foundation, a proponent of the medication-based Sinclair Method for treating alcohol dependence.

Susan Ivanova is a lead fictional character in the science fiction television series Babylon 5, played by Claudia Christian.