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O'Neill Monahan
Known For
The Middle
76%
Lucas
2009
Monster: The Ed Gein Story
73%
Cousin Geoff
2025
The Santa Clauses
71%
Teen
2022
The Odd Couple
58%
Noah
2015
Summer Camp Island
77%
Additional Voices (voice)
2018
Teachers
54%
Ron
2016
Let Us In
53%
Christopher
2021
Monster: The Ed Gein Story
73%
Cousin Geoff
2025
The Santa Clauses
71%
Teen
2022
Let Us In
53%
Christopher
2021
Killer Grandma
57%
Young Tom
2018
Summer Camp Island
77%
Additional Voices (voice)
2018
Teachers
54%
Ron
2016
The Odd Couple
58%
Noah
2015
The Middle
76%
Lucas
2009