O'Neill Monahan

Known For

7.6

The Middle

2009· TV Series

7.7

Summer Camp Island

2018· TV Series

7.2

Monster: The Ed Gein Story

2025· TV Series

5.3

Teachers

2016· TV Series

5.8

The Odd Couple

2015· TV Series

7.1

The Santa Clauses

2022· TV Series

5.6

Killer Grandma

2018

5.3

Let Us In

2021

Filmography

• 2025TVMonster: The Ed Gein Storyas Cousin Geoff
• 2022TVThe Santa Clausesas Teen
• 2021MovieLet Us Inas Christopher
• 2018MovieKiller Grandmaas Young Tom
• 2018TVSummer Camp Islandas Additional Voices (voice)
• 2016TVTeachersas Ron
• 2015TVThe Odd Coupleas Noah
• 2009TVThe Middleas Lucas