These days celebrities believe in a lot of weird things, from Bigfoot, to 9/11 being an inside job...so aliens don't seem all that far out.

Here are 11 Celebrities Who Believe in Aliens:

Some belong to the "it just makes sense" contingent. Like Bill Nye the Science Guy, who says there are 2 trillion planets in our galaxy, and thus, quote, "Aliens gotta be out there."

And William Shatner says the mathematics lead you to the "absolute conclusion" that we are not alone.

On a similar note, Demi Lovato, Halle Berry, and Katy Perry think it's self-centered to assume ours is the only planet with life on it.

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Then there are those who claim they've seen alien spacecraft, like Kesha, Nick Jonas, and Khloe Kardashian.

Tom DeLonge from Blink-182 and Angels and Airwaves is legitimately and heavily involved in the search for intelligent life from other worlds. Then there's Megan Fox, who just believes in everything including ghosts and Bigfoot.

They also threw in Zooey Deschanel, just because her sister used to torment her by claiming she was from Neptune. But that doesn't exactly mean she BELIEVES, does it?