Seamus Dever

Seamus Dever (born July 27th, 1976) is an American actor, best known for playing Detective Kevin Ryan in the television series Castle (2009).

Seamus Dever has built a filmography of 14 credits over a career spanning from 1999 to 2023.

Seamus Dever's most notable role to date came in Titans (2018), where he played Trigon. He also appeared in NCIS (2003) as Gabriel LaRoche. Most recently appeared in Castle (2009) as Kevin Ryan.

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