Here's a rundown of 21 celebrities who believe aliens are real, and what they've said about our extraterrestrial neighbors.

What on Earth?! Most Americans believe that aliens exist — and more than one in five think they’ve already paid our planet a ...

People have questioned the existence of life on other planets for centuries, including celebrities. Here are five stars who ...

Many have watched recently released UFO videos, but most still think the government knows more than it is saying.

What Steven Spielberg's new alien movie reveals about our UFO obsessions.