Kelly Ripa and Ryan Seacrest dress up as each other for Halloween: See all their costumes

Jennifer Kline, AOL.com

"Live with Kelly and Ryan" -- but wait, which one is which?

Kelly Ripa and Ryan Seacrest went all out for Halloween this year, debuting a collection of top-notch costumes, and we love them all. But one ensemble overshadowed all the rest: They became each other!

Prosthetics, wigs and a whole lot of makeup transformed Kelly into Ryan and vice versa, creating a vaguely nightmarish mutation of the duo.

Although the swap was their most impressive transformation, the co-hosts donned countless costumes to celebrate the holiday. Among their inspirations? Wonder Woman, "The Handmaid's Tale," and their teenage selves.

Take a look at all of Kelly and Ryan's Halloween costumes in the slideshow below.