O'Neill Monahan

Acting

Known for

The Middle

The Middle

2009

Monster: The Ed Gein Story

Monster: The Ed Gein Story

2025

The Santa Clauses

The Santa Clauses

2022

The Odd Couple

The Odd Couple

2015

Summer Camp Island

Summer Camp Island

2018

Teachers

Teachers

2016

Let Us In

Let Us In

2021

Killer Grandma

Killer Grandma

2018

Acting8

Monster: The Ed Gein Story

Monster: The Ed Gein Story

2025

Cousin Geoff

The Santa Clauses

The Santa Clauses

2022

Teen

Let Us In

Let Us In

2021

Christopher

Killer Grandma

Killer Grandma

2018

Young Tom

Summer Camp Island

Summer Camp Island

2018

Additional Voices (voice)

Teachers

Teachers

2016

Ron

The Odd Couple

The Odd Couple

2015

Noah

The Middle

The Middle

2009

Lucas