She has a younger sister, Kallan, who also does voice acting.
Some of Addison's notable roles include:
- Caillou: Layla
- Daniel Tiger's Neighborhood: Miss Elaina
- Ella the Elephant: Ella
- Grojband: Allie Day
- Little Charmers: Hazel
- My Babysitter's a Vampire: Anastasia
- My Big, Big Friend: Lili
- PAW Patrol:
- Julia Goodway (Darrined by Holly Gorski in Season 5)
- The Cheetah
- Peg + Cat: Tessa
- PJ Masks: Amaya/Owlette
- Really Me: Jenny Donkers
- Thomas & Friends: All Engines Go: Riff
- True and the Rainbow Kingdom: Day Queen
- Wishenpoof: Bianca
- Xavier Riddle and the Secret Museum: Butterfly Club Leader
- The ZhuZhus: Jessica Beeker
Some tropes relating to her roles include:
- Cheerful Child: Allie and Julia, who are bubbly young girls.
- Kid Hero: Amaya, a child superhero.
