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Timberly Johanssen is a fictional character in the Hey Arnold! TV Series.

Timberly is Gerald and Jamie O's little sister. Jamie O is nice to Timberly more than his brother Gerald, whom he usually bullies. Her innocent actions often cause Gerald to get in trouble. She is voiced by Avriel Epps.

Age Inconsistency

Unlike all the other children in the show, Timberly seems to be a character who ages across seasons. In her first appearance, she was stated to be four years old, but by the fifth season, she is in the first grade.

Appears in

Mentioned in

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