Reed Edward Diamond is a well-known American actor best known for his roles such as Detective Mike Kellerman on Homicide: Life on the Street, Jason Pillar in season 8 of 24, and Laurence Dominic on Dollhouse.
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Reed Edward Diamond was born on July 20, 1967, in Brooklyn, New York, United States of America. Reed Diamond is 57 years old as of 2023. Diamond was born to Allison, an astrologer, and Bob Diamond, a director of shows like The Joe Franklin Show.

Reed Diamond grew up in Manhattan and attended the Trinity School. Diamond went to the University of North Carolina at Chapel Hill for two years before studying acting at the Juilliard School, where he was part of the Drama Division’s Group 20 from 1987 to 1991.
Diamond’s early career included guest roles on Law & Order and Class of ’96, and parts in films like Memphis Belle (1990), Clear and Present Danger (1994), and Her Hidden Truth (1995). His big break came in 1995 when he joined the cast of Homicide: Life on the Street as Detective Mike Kellerman.
Reed Diamond was a regular cast member for three seasons and returned for a two-episode story in the final season and a feature-length TV movie in 2000.
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Reed Diamond also had a notable role in the pilot episode of The Shield as Detective Terry Crowley. His character’s unexpected murder at the end of the first episode shocked viewers. Other significant roles included appearances in High Noon (2000), S.W.A.T. (2003), Spider-Man 2 (2004), and Good Night, and Good Luck (2005).
In the 2000s, Reed Diamond had recurring roles in Judging Amy as Stuart Collins and Dollhouse as Lawrence Dominic. He also guest-starred in many popular TV shows such as Crossing Jordan, The West Wing, Medium, Numb3rs, CSI: Crime Scene Investigation, Stargate SG-1, Without a Trace, The Mentalist, 24, and Common Law. He played Inspector Jack Vasser in the NBC series Journeyman until its cancellation in 2007.

In the 2010s, Reed Diamond appeared in the TNT series Franklin & Bash and played senior HYDRA agent Dr. Daniel Whitehall/Werner Reinhardt in Agents of S.H.I.E.L.D. He also had roles in Firebreather, Moneyball, Common Law, and Wayward Pines. He portrayed plantation owner Tom Macon in the WGN series Underground.
Reed Diamond was married to Fredrika Kesten from 1995 to 1997. Since 2004, he has been married to actress Marnie McPhail. The couple met in 2002 on the set of the Lifetime television movie Scared Silent. They have one child together.


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