You've seen the sketch, now it is time to go behind the scenes! Radzi meets all the great people involved in putting this together and shows you the secrets of this very special Red Nose Day sketch!
Behind the Scenes with Radzi on The Worst Witch
Who do you think was the funniest?
Now we know what made Miss Hardbroom laugh, but who do YOU think was the funniest? Share your opinion by clicking on the character you thought was the best!
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Share your best joke!
We hope you've managed to make someone laugh for Red Nose Day! You can make even more people laugh by sharing your best joke in the comments below.