ActorBorn Sep 28, 1989 (age 36)New York, USA

Cillian O'Sullivan

On July 8, 2026

#31,749▲2,048most popular person online

0.1Attention Score

Cillian O'Sullivan

American-born Irish actor

Known ForActing

BirthdaySep 28, 1989

Daily Popularity History

Daily Attention Score for Cillian O'Sullivan over the last 30 days

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Rankings

Daily Attention Score rankings for Cillian O'Sullivan

Current#31,749▲2,048of 67,958 peopleOn Jul 8, 20260.1 score 1-Year#19,604365-day averageJul 2025 – Jul 20260.1 score All-Time Peak#20,705of 66,848 peopleJul 17 – Aug 15, 20250.5 score

Cillian O'Sullivan Top TV Shows

Cillian O'Sullivan's shows ranked by Attention Score

Daredevil: Born Again

Daredevil: Born Again

Devlin · 3 ep · 2025 – Present

Vikings

Eirik · 1 ep · 2013 – 2020

The Blacklist

Skip Sutherland · 2 ep · 2013 – 2023

Star Trek: Strange New Worlds

Star Trek: Strange New Worlds

Dr. Roger Korby · 4 ep · 2022 – Present

Chicago P.D.

Shane Sullivan · 1 ep · 2014 – Present

FBI: Most Wanted

FBI: Most Wanted

Scot Weitzen · 1 ep · 2020 – 2025

Bull

Nathan Alexander · 1 ep · 2016 – 2022

In From the Cold

In From the Cold

Chauncey · 8 ep · 2022

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Cillian O'Sullivan Top Movies

Cillian O'Sullivan's movies ranked by Attention Score

Blue Moon

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