Why is this GIF freaking out Harry Potter fans?

Daniel Radcliffe morphing into Elijah Wood has some Harry Potter and Lord of the Rings fans feeling a bit unsettled. 

You would think that spotting the difference between the two actors, who play Harry Potter and Frodo in the hit moves, would be super easy.

But a GIF that has gone viral has led some to believe Daniel and Elijah are long lost twins.

Some call it good make-up; others are just freaked out by their uncanny resemblance – we just want to make it stop!

We have to admit, though, the subtle difference between the two it is kind of creepy! 

Can you tell who is who? Here’s a hint, it is all in the eyebrows.