From the Washington Post:
That little white ball on the right? That’s Earth.
Astronomer Carolyn Porco, the leader of the Cassini imaging team who conceived of the July 2013 photo shoot. She and her colleagues organized a campaign to smile into the void at 21:27 Coordinated Universal Time (accounting, of course, for light’s 15-minute dash from Earth to Saturn. It would be only the third time that Earth had been photographed from such a distance, after an earlier Cassini image and the Voyager portrait. It also marked the first time that Earth inhabitants knew they were being photographed from the outer solar system, beyond the asteroid belt.
(NASA/JPL-Caltech/Space Science Institute/AP)
More photos here.