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Ms. Grunion is the main antagonist of Dreamworks' 2014 film, Mr. Peabody & Sherman. She is voiced by Allison Janney. She is Mr. Peabody & Sherman's arch-nemesis.


Ms. Grunion is a cruel, rude, strict, pompous, manipulative, selfish, and untrustworthy social worker attempting to get Sherman taken away from Mr. Peabody. She doesn't actually care for Sherman's well-being; she actually wants to make his and Peabody's lives miserable.

In the movie

Ms. Grunion is first introduced when Mr. Peabody meets with the Principal about Sherman biting Penny in the lunchroom. She walks out of an office on the side of the Principal's office. She is shown to have more power over the Principal, and she is defeated by Agamemnon and the Police. In the end, as she says that one day, Mr. Peabody will make a wrong move and that then, she will get him, Agamemnon grabs her as he is taken back to his time, taking her as well.


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