Andy's talked before about the lengths he went to to play Gollum, so this is a fantastic chance for Newsround's surfers to get under his skin.
In the film Gollum was entirely computer generated and voiced by Andy.
For many scenes, Andy wore something called a motion-capture suit - that lets the computer transfer the actor's natural movements directly into Gollum.
Praise
It makes Gollum seem more realistic than other CG characters.
Much to the disappointment of Rings fans Andy hasn't been nominated for a best supporting Oscar.
But praise has come from an unexpected source.
The One Ring.net had a report recently from Ringer spy Lisa who says the CG used for Gollum is so good, her deaf husband can lip read the character.
To ask Andy anything you like just click on the link top right and we'll do our best to make sure he answers as many as possible!
Hear story
Andy Serkis in the hotseat
Are you a Rings quiz-whizz?
