Tom Cruise

Everybody knows that a proper alias is the name of the street you grew up on, then the name of your first pet. Tom Cruise — who checks in as Cage Hunt — is the only celebrity to kind of follow this rule and at least choose names with a meaning from his past. "Cage" comes from Lieutenant Colonel Bill Cage, the character he played in "Edge of Tomorrow," and Ethan Hunt from the "Mission Impossible" movies.