But how much do you love Twilight? Enough to spend a whole evening watching the films back-to-back? Enough to buy a t-shirt that says Team Edward or Team Jacob? Or enough to name your baby after one of the characters?
Well, that's just what's happening in the US. New figures show that in 2009, Isabella (the name of the story's lead character) was the most popular name given to baby girls. While Jacob (Isabella's werewolf best friend) is the most popular boys name.
Jacob has actually been the most popular boys' name for 11 years and Edward (Robert Pattinson's vampire character) didn't improve much. But the name Cullen (Edward's surname) was the fastest rising name for boys - jumping over 300 places to number 485.
The name Bella (which Isabella is mostly known as in the book) was alsothe 58th most popular girls' name.
Would you name your baby after a book or film character? Would you want your baby's name to be one of the latest trends? Tell us what you think by leaving a comment below or let us know about your kids names on facebook.
Where to next?- Get ideas for baby names
- See our Robert Pattinson pictures
- Test your Twilight knowledge