Emma Roberts is terrified of zombies.

The 22-year-old actress has been left with an irrational fear of the undead after watching Brad Pitt's zombie apocalyptic horror 'World War Z'.

In a post on her Twitter account, she revealed: ''Literally so scared of zombies after World War Z!''

Apart from her new phobia of flesh-eating monsters, Emma loved the action flick.

However, she thinks the movie would have been better if Brad's fiancée Angelina Jolie played his character Gerry Lane's wife Karin Lanein the film.

She tweeted: ''Watching World War Z. So good! Wish Angelina Jolie had played the wife though! Just saying...''

Just as the 'Scream 4' star is a fan of Brad and Angelina she recently admitted she was totally star-struck when she met the actor's ex-wife Jennifer Aniston.

Emma stars alongside Jennifer in comedy movie 'We're The Millers' and was blown away the first she was introduced to her

She recently said: ''It was surreal. When I met her she came up and gave me a big hug. I was so star struck I froze with my arms by my side and just said, 'Hi, I'm so nervous to meet you.' ''