Vyvan Pham (born November 16, 1978) is an American voice actress, perhaps best known for her role as "Julie Yamamoto" on Ben 10: Alien Force, and Ben 10: Ultimate Alien. She also voiced Outsider member "Katana" in Batman: The Brave and the Bold. She has also provided voices for a few video games including X-Men: The Official Game, Spider-Man 3, and others.