Cillian O'Sullivan

We don't have a biography for Cillian O'Sullivan yet.

Known For

81%User score 81 percent

Series

Vikings

2013 · Action & Adventure · Drama

84%User score 84 percent

Series

Chicago P.D.

2014 · Crime · Drama

76%User score 76 percent

Series

The Blacklist

2013 · Drama · Crime

79%User score 79 percent

Series

Star Trek: Strange New Worlds

2022 · Sci-Fi & Fantasy · Drama

82%User score 82 percent

Series

Daredevil: Born Again

2025 · Drama · Action & Adventure

76%User score 76 percent

Series

FBI: Most Wanted

2020 · Crime · Drama

70%User score 70 percent

Series

Bull

2016 · Crime · Drama

67%User score 67 percent

Series

In From the Cold

2022 · Drama · Action & Adventure

68%User score 68 percent

Movie

Halo: Nightfall

2014 · Science Fiction · Action

49%User score 49 percent

Series

Then You Run

2023 · Drama · Crime

61%User score 61 percent

Series

The Boy That Never Was

2024 · Drama

63%User score 63 percent

Movie

The Lost Princess

2025 · Action · Adventure

NRNot yet rated

Series

6Degrees

2012 · Drama