Penny Peterson is the daughter of Paul and Paula Peterson and the tritagonist in Mr. Peabody & Sherman. She's voiced by Ariel Winter. She is Sherman's nemesis turned best friend and crush.


Penny is a serious girl for someone of her age. For some reason, she and Sherman don't get along as Sherman mentioned. She appeared to have been envious of Sherman's smarts and called him a dog. However, later they form a very strong friendship during their adventure. Sherman has a large crush on her. Penny also seems to have a crush on Sherman as well.

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