Nicolas Cage is a time traveler.  A Civil War photo, taken 140 years ago, shows someone who looks remarkably like him.  Other time travelers, with photos to match, include:

Jimmy Fallon

Chuck Norris

Natalie Portman

Jennifer Lawrence

John Krasinksi

Jay-Z

Johnny Depp

Justin Timberlake

Rupert Grint (from Harry Potter fame)

Eddie Murphy

Charlie Sheen

Brad Pitt

John Travolta

Michael Jackson

Sylvester Stallone

Matthew McConaughey

Daniel Radcliffe (Harry Potter)

Bruce Willis

Matthew Perry