She ran a blog called Toddler Tattler where she posted out of context pictures that made Jessie, and other nannies, look like they were lousy at their jobs. However, Jessie and Christina Ross blackmailed her into taking it down. Agatha is similar looking to Nanny McPhee from the film franchise, Nanny McPhee, but their personalities are completely different. She is portrayed by Jennifer Veal. She has a twin sister, Angela, also portrayed by Jennifer Veal.
- "World Wide Web of Lies"
- "Beauty and the Beasts"
- "Evil Times Two"
- She is a nanny for a kid named Axel in "World Wide Web of Lies", and returns with a girl named Lindsey in "Beauty and the Beasts".
- She used to run a familiar blog called Toddler Tattler, which she shutted down.
- She looks similar to Nanny McPhee. This might be a reference to the movie.
- Her website, Toddler Tattler, is actually a real website, but not about Jessie and the others nannies.
- She is shown to be unpretty and horrible looking.
- Jessie calls her Hagatha and Evil Agatha.