6. Kevin Costner - Robin Hood (Robin Hood: Prince of Thieves)
It's a testament to Kevin Costner's acting career that, despite the fact Robin Hood probably didn't even exist in real life, he could still feel so horribly miscast in the role.
Robin Hood: Prince of Thieves - which is a far weirder movie than I remember it being as a kid - is about as camp as a Scout meet in retrospect, but it looks to have been designed with that kind of Sunday afternoon "I can't be bothered to change the channel" laziness, anyway, so no harm done. But Costner is the leading man here, and he's not pulling it off at all. He's playing... himself? The man doesn't even attempt an English accent. Why? I mean, everybody else is having a go - it's odd. Granted, he probably did us a favour, given that he has a reputation for struggling to say lines properly in his own accent. Maybe I'm being too harsh, but my point stands: Kevin Costner makes for a horrible, totally unbelievable and ultimately boring Robin Hood. He's nowhere near as exciting and witty and ball-busting as I imagined him to be as a kid. For my money, that fox from the Disney version had it pretty much spot-on. Apart from the whole "being a fox" thing.