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.
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.
- 13b. Gerald Comes Over
- 30a. Ransom
- 32a. The High Life
- 34b. Gerald Moves Out
- 52b. Cool Party (no cues)
- 60. Parents Day (no cues)
- 61b. Stinky's Pumpkin (no cues)
- 67b. Chocolate Turtles
- 68a. Love and Cheese (no cues)
- 71. Veterans Day (no cues)
- 88b. Gerald vs. Jamie O
- 97a. Timberly Loves Arnold
- Hey Arnold! The Movie (no cues)
- Hey Arnold! The Jungle Movie (no cues)
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