Klaatu

Klaatu may refer to:


 * Klaatu (The Day the Earth Stood Still), the protagonist in the 1951 science fiction film and its 2008 remake
 * Klaatu (band), a Canadian progressive-rock group formed in 1973
 * Klaatu (album), the U.S. name for their first album, 3:47 EST
 * Klaatu (comics), a Marvel Comics alien
 * Klaatu (Star Wars), a minor character in the original trilogy
 * The Klaatu Diskos, a young-adult book series by Pete Hautman
 * Klaatu, alien antagonists in Starfleet Orion, a 1978 science-fiction strategy game