He may be the star of one of the most valuable film franchises in movie history, but Saturday Night Live comedian Jason Sudekis struggles to remember the name of JK Rowling's smash hit series in this trailer...

Of course it's all just fun and games ahead of actor Daniel Radcliffe's guest hosting duties on the iconic American comedy show this weekend, but one thing's for sure, he is going to have to maintain his sense of humour if he's going to survive a full show of US ribbing. 

To show he has what it takes, Radcliffe demonstrates he's more than just a one-trick wizard in the trailer, wheeling out his American accent, and before he has a chance to start feeling comfortable, Sudekis gives the 22-year-old a few words of advice:

"Here's the three things you've got to remember.  One, dance like nobody's watching. Two, you've got to love like you've never been hurt. Three, gotta remember this, everybody's watching and you could get hurt. Live TV, no net."

Here's the trailer: