Peter Dinklage -- Spanish Fans Can't Get Enough ... Of His Stunt Double

Either Peter Dinklage has the most loyal fans in the world ... or the dumbest -- which is a label they might be stuck with after screaming in joy for a look-a-like.

You'd like to give the overeager fans outside the cast's hotel in Osuna, Spain the benefit of the doubt. Maybe they're simply cheering anyone who has anything to do with "Game of Thrones."

However, it seems clear they can't tell the guy is a fake.

To us, Peter's stunt double looks more like the love child of Dinklage and Dave Grohl ... but judge for yourself.