Jennifer Garner thrilled to play mean onscreen

Jennifer Garner was happy to play a "heinous person" in new movie Butter because she's sick of portraying the girl next door.

The actress, who is married to actor/director Ben Affleck, plays an ambitious Iowa butter sculptor in the comedy and she relished the opportunity to show off her "inner b**ch".

She says, "I play a lot of girl next doorish kinds of characters. I am a girl next door in real life and I am sick of myself! I am so over it. I don't want to see another simpering smile; I'm done!

"So this, to me, was heaven on earth. She (character) is not to be emulated in any way and she is a heinous person but, as far as relating to the ambition and the competitiveness, I think it stretches it for me."