About Seamus Dever
Born 1976. Seamus Dever is an American actor, television actor and film actor.
Seamus Patrick Dever (born July 27, 1976) is an American actor known for his role as Detective Kevin Ryan in the ABC series Castle.
Early life
Dever was born in Flint, Michigan, and moved at the age of six to Bullhead City, Arizona, where he grew up. He graduated as valedictorian of Mohave High School, completed his undergraduate studies at Northern Arizona University, and holds MFAs in Acting from the Moscow Art Theatre and Carnegie-Mellon University.
Personal life
A lifetime member of the Actors Studio, Dever married Juliana Dever on May 27, 2006. Juliana played Kevin Ryan's wife Jenny on Castle. He is a cousin of Broadway actress Jeanne Arnold and Canadian singer-songwriter Feist.
Dever and his wife are vegetarians. Both are also supporters of Best Friends Animal Society.
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Important facts
Family & relationships
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Contemporaries
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Frequently asked questions
Who is Seamus Dever?
American actor
When was Seamus Dever born?
Seamus Dever was born on 27 July 1976 in Flint.
What is Seamus Dever's occupation?
Seamus Dever is an actor, television actor and film actor.
What nationality is Seamus Dever?
Seamus Dever is American.
Sources & further reading
Cite this page
APA: Biography.guide. (2026). Seamus Dever. https://biography.guide/seamus-dever/
MLA: "Seamus Dever." Biography.guide, https://biography.guide/seamus-dever/.
Chicago: "Seamus Dever." Biography.guide. https://biography.guide/seamus-dever/.
Data last updated: 2026-09-22 · Spot an error? Report a correction.
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