| John Keefe | |
| Caption: | John Keefe. |
| Birth Name: | Jonathan Keefe |
| Birth Date: | 29 October 1979 |
| Birth Place: | Boston, Massachusetts, U.S. |
| Years Active: | 2004—present |
John Keefe (born October 29, 1979) is an American film and television actor, best known for playing Julian Garrison in and its following sequel, .
He was also the chief visual effects machinist for The Aviator.