Illegal Alien or Illegal Aliens may refer to: Alien (law), legal concept of aliens Illegal alien, the statutory and legal term used in some countries for an illegal immigrant or other unauthorized resident Illegal aliens (Library of Congress Subject Heading), replaced with the heading "Noncitizens" in 2021 Enemy alien
Entertainment Illegal Aliens (film), a 2007 film starring Anna Nicole Smith and Chyna Illegal Aliens (novel), a 1989 science fiction novel by Nick Pollotta and Phil Foglio Illegal Alien (Sawyer novel), a 1997 science fiction novel by Robert J. Sawyer Illegal Alien (Tucker and Perry novel), a 1997 Doctor Who novel by Mike Tucker & Robert Perry Illegal Alien, a graphic novel by James Robinson "Illegal Alien" (song), a track on the album Genesis by Genesis (1983) "Illegal Aliens" (My Hero), a 2005 television episode