Today, we have word that a secret cameo has been revealed, so if you don't want to be spoiled by this new information, stop reading now.

SPOILERS AHEAD!

Digital Spy is reporting that X-Men: The Last Stand star Kelsey Grammer will have a cameo appearance as Hank McCoy, a.k.a. Beast in X-Men: Days of Future Past.

Here's what an unidentified insider had to say about the cameo, which will occur towards the end of the film as the actor playing an "alternate adult Beast."