Pottermore is the place to go for all the Harry Potter and it's like a bible for any JK Rowling fans out there.

One of the website's newest features is being able to find out what your Patronus is.

If you can't remember from the movie, a Patronus is like your animal guardian that protects you against those rotten dementors.

So, when one former Harry Potter star logged on to her account to see what her guardian animal is, she was none too pleased to find out she got a… Salmon.

Evanna Lynch took to Twitter to complain to Pottermore and said: "I don't geddit @pottermore… all of my happiest memories are spent in the presence of cats.

"Why oh why is my Patronus a SALMON?!" 

To be honest, we'd be pretty miffed too.