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Cillian O'Sullivan - Actor & Filmmaker | The Couch Critic

Home/People/Cillian O'Sullivan

Place of Birth

New York, USA

Known For

Acting

Gender

Male

Career Highlights

5

Movies

10

TV Shows

Also Known As

Cillian O'Suilleabhain

Cillian Ó Súilleabháin

External Links

Cillian O'Sullivan

The Lost Princess poster

The Lost Princess

October 16, 2025

Misty Button poster

Misty Button

Maze poster

Maze

September 22, 2017

Halo: Nightfall poster

Halo: Nightfall

as Christian Ramsey (uncredited)

February 5, 2014

Uncle Bill's Barrel

October 18, 2008