Portrait of Sean Grennan

Sean Grennan

Bio: An actor for many years, Sean began writing for the theatre as co-librettist for the musical Phantom of the Country Opera, which had its world premiere at the Marriott Theatre in Lincolnshire, Illinois. He went on to debut five shows at the American Heartland Theatre in Kansas City –his comedies Beer for Breakfast and As Long As We Both Shall Live and his musicals (librettist/lyricist) Married Alive!, A Dog’s Life, and Another Night Before Christmas
Born: Unknown birthdate.
Birthplace: Chicago, Illinois, U.S.
Sean Grennan is ?
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Movies (Acting Roles)

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Poster of The Untouchables
The Untouchables
Sean Grennan was ? in The Untouchables as 'Cop Cousin'.
Movie Released: Wed, Jun 03 1987

TV Shows (Acting Roles)

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Ages in TV shows are based off the first air date and may not be accurate. View individual episode details for accurate ages
Poster of MINDHUNTER
MINDHUNTER
Sean Grennan was ? in MINDHUNTER as 'Ken'.
TV Show Released: First Air Date
Fri, Oct 13 2017
Poster of Law & Order: Criminal Intent
Law & Order: Criminal Intent
Sean Grennan was ? in Law & Order: Criminal Intent as 'I.A.B. Detective Roland'.
TV Show Released: First Air Date
Sun, Sep 30 2001
Poster of Law & Order: Special Victims Unit
Law & Order: Special Victims Unit
Sean Grennan was ? in Law & Order: Special Victims Unit as 'Wilkins'.
TV Show Released: First Air Date
Mon, Sep 20 1999
Poster of Early Edition
Early Edition
Sean Grennan was ? in Early Edition as 'Patrol Officer'.
TV Show Released: First Air Date
Sat, Sep 28 1996