He might not immediately scream creepy sidekick right now, but that might just change when Paul McGuigan's Frankenstein is released late next year, and there is certainly something non-conventional about the former Harry Potter's appeal. He has grown up on screen, from sweet innocence in the first Harry Potter to a slightly gawky adulthood that is likely to see him star in less conventionally star-lead projects like The Woman In Black, Kill Your Darlings and A Young Doctor's Notebook. And there's no doubt he would bring some appropriate energy to a young, slightly unrestrained Joker, perhaps leading to the kind of career swing that Elijah Wood enjoyed with Sin City and Maniac. If he was to look for inspiration for his performance, he shouldn't look too far beyond his Harry Potter co-star David Tennant, whose unsettling, tweaked performance as Barty Crouch Junior in The Goblet Of Fire. Part meth-laced fever, part wild-man thanks to his tongue-flicking idiosyncracy that brought a serpentine feel to the character that perfectly fit his villainy. If Radcliffe could bring some of that energy to what he has already done on screen, we could see the makings of a very memorable supporting character, though of course his profile might negate the impact of the revelation that his character is the Joker in the end.
