You don't need a green mask to be an alien for Halloween ... When it comes to adult Halloween costume ideas, the classics are classic for a reason. Still, you can change things up a little ...

Disco, medieval, out of this world (yep, we have alien costumes), it's all here ... Shop Now Marvel Wolverine Adult Costume ...

Heidi Klum's legacy of over-the-top and intricate costumes has proved why she's been dubbed the "Queen of Halloween." ...

Disco, medieval, out of this world (yep, we have alien costumes), it's all here. Check out the 59 best last-minute Halloween costumes for men. A Where's Waldo costume for under $25? Book it.