Brian Dietzen

Brian Dietzen Headshot

Actor

Birth Date: November 14, 1977

Age: 46 years old

Birth Place: Barrington, Illinois

American actor Brian Dietzen is renowned for his long-running role on the military procedural drama "NCIS" (CBS, 2003- ). A native of the Midwest, he got his start in theater productions and won his first screen roles while in his mid-twenties. After appearing on the short-lived comedy show "My Guide to Becoming a Rock Star" (The WB, 2002), Dietzen made his feature debut in the universally panned "American Idol" spin-off "From Justin to Kelly" (2003). These career setbacks swiftly receded, however, when he was cast in 2004 in the recurring part of nerdy technician Jimmy Palmer on "NCIS." While Dietzen occasionally moonlights in low-budget films, "NCIS" has remained his main focus, let him develop his slightly awkward character over numerous seasons on the consistently popular series.

Born in suburban Illinois, Dietzen studied drama in the acting program at the University of Colorado at Boulder and gained stage experience before auditioning for television parts. In 2002, he joined the cast of the sitcom "My Guide to Becoming a Rock Star" as Owen, drummer of the show's fictional band, but the plug was quickly pulled. While appearing in the feature musical "From Justin to Kelly" likely seemed like a good opportunity at the time, the critical backlash against the movie was fierce, and Dietzen had to soldier on. His persistence soon paid off, however, since he landed a recurring gig on "NCIS." Cast as Jimmy Palmer, the bookish assistant to medical examiner Donald "Ducky" Mallard (David McCallum), Dietzen gradually became more of a presence on the naval crime drama. With the weekly series keeping him busy, he worked on other productions from time to time, including "Congratulations" (2012), an indie film that he co-wrote and starred in, and a guest spot on the mystery series "Perception" (TNT, 2012-14). In 2012, with more than 100 "NCIS" episodes under his belt, he was promoted to a series regular.

Credits

NCIS: Hawai'iStream

Guest Star
Jimmy Palmer
Series
2021
60%

STEVE on Watch

Guest
Talk
2017

NCIS: New OrleansStream

Guest Star
Series
2014

Steve Harvey

Guest
Talk
2012

Congratulations

Actor
Jim Riley
Movie
2012

Congratulations

Producer
Movie
2012

Congratulations

Screenwriter
Movie
2012

Seymour Sally Rufus

Actor
Seymour
Movie
2011

The Talk

Guest
Talk
2010

The Future of Gaming: E3 2010

Guest
Show
2010

Past Life

Guest Star
Show
2010

Karaoke Man

Actor
Louis
Movie
2010

Nowhere to Hide

Actor
Sheldon Wilkes
Movie
2009

NCISStream

Actor
Dr. Jimmy Palmer
Series
2003

NCISStream

Guest Star
Jimmy Palmer
Series
2003

NCISStream

Writer
Series
2003

From Justin to Kelly

Actor
Eddie
Movie
2003

One on OneStream

Guest Star
Series
2001

The Price Is RightStream

Guest
Game Show
1972

News aboutBrian Dietzen

Brian Dietzen and Katrina Law of 'NCIS'
Spoiler Alert

‘NCIS: Case Closed’ Aftershow: Brian Dietzen & Katrina Law Go Inside Finale (VIDEO)

Brian Dietzen as Jimmy Palmer and Katrina Law as Jessica Knight in the 'NCIS' Season 21 Finale
Spoiler Alert

‘NCIS’ Season 21 Finale: Is Katrina Law’s Knight Leaving?

Sean Murray in 'NCIS'-'Hawai'i'-'LA' Crossover

‘NCIS’ Star Sean Murray Gives His Co-Stars Yearbook-Style Superlatives

Cote de Pablo, David McCallum, Michael Weatherly, Sean Murray, Mark Harmon in NCIS

37 Best Episodes of ‘NCIS’ Over All 21 Seasons

Cast of NCIS, Brian Dietzen, Rocky Carroll, Pauley Perrette, Mark Harmon, Michael Weatherly, Emily Wickersham, Sean Murray and David McCallum

Why ‘NCIS’ Still Rules TV

Brian Dietzen as Jimmy Palmer, Russell Wong as Special Agent in Charge Feng Zhao, and Katrina Law as Jessica Knight — 'NCIS' Season 21 Episode 5

‘NCIS’: Palmer Meets Knight’s Father — And It Won’t Go As Planned (PHOTOS)

Sean Murray, Gary Cole, Brian Dietzen, Katrina Law, and Wilmer Valderrama shooting 'NCIS'

Will ‘NCIS’ Return for Season 22? Brian Dietzen Asks, ‘Why Stop at 1,000’ Episodes?

Brian Dietzen as Jimmy Palmer and Katrina Law as NCIS Special Agent Jessica Knight — 'NCIS' Season 21 Episode 2
Preview

‘NCIS’: What Does This Big Step Mean for Jimmy & Jessica’s Relationship?

Brian Dietzen, Michael Weatherly, and Sean Murray — 'NCIS' Season 21 Episode 2

‘NCIS’ Star on His Big Return: ‘Ducky Would Have Loved All the Smiles’ — Plus Check Out Photos

Spoiler Alert

‘NCIS: Case Closed’ Aftershow: Brian Dietzen Explains Tony’s Return for Ducky Tribute (VIDEO)

David McCallum in 'NCIS'
Spoiler Alert

‘NCIS’: Brian Dietzen Explains Change for Last Opening Credits With David McCallum

David McCallum as Dr. Donald
Q&A

‘NCIS’: Brian Dietzen Talks Writing Ducky Tribute & Shares David McCallum Memories

David McCallum as Dr. Donald 'Ducky' Mallard in 'NCIS' - 'Unearth'
Spoiler Alert

How ‘NCIS’ Premiere Just Set Up Ducky Tribute Episode

David McCallum in 'NCIS'

‘NCIS’: 7 Things We Want to See in Ducky Tribute in Season 21

Brian Dietzen as Jimmy Palmer, Katrina Law as NCIS Special Agent Jessica Knight, Wilmer Valderrama as Nick Torres, Diona Reasonover as Forensic Scientist Kasie Hines, and Gary Cole as Special Agent Alden Parker — 'NCIS' Season 21 Episode 2

‘NCIS’ Pays Tribute to David McCallum: See Team Mourn Ducky & Work His Unfinished Case (PHOTOS)

Katrina Law as Special Agent Jessica Knight, Sean Murray as Special Agent Timothy McGee, and Gary Cole as Special Agent Alden Parker in the 'NCIS' Season 21 Premiere

‘NCIS’ Trailer Reveals Torres’ Message to Team About His Arrest & Ducky Farewell (VIDEO)

The cast of NCIS
Preview

‘NCIS’: Will Torres Lose His Badge? Plus, Scoop on Ducky Tribute & More

David McCallum as Medical Examiner Dr. Donald 'Ducky' Mallard in NCIS

‘NCIS’ Sets David McCallum Tribute — What to Expect

Katrina Law, Gary Cole, and Brian Dietzen in 'NCIS'
Preview

‘NCIS’ Boss Teases Palmer & Knight’s Relationship Coming to the Office (PHOTOS)

Brian Dietzen in 'NCIS,' Kelli Giddish in 'SVU,' and Jennifer Love Hewitt in '9-1-1'

Essential Cast Additions on ‘NCIS,’ ‘SVU,’ ‘9-1-1’ & More After Series Premiere

Francis Xavier McCarthy and Gary Cole - 'NCIS'
Preview

‘NCIS’ Episode 450 Will Reveal Much More About Parker’s Backstory

Wilmer Valderrama, Brian Dietzen, Sean Murray, Katrina Law, and Gary Cole for 'NCIS'
Q&A

Will Gibbs Return? ‘NCIS’ Cast Answers Your Burning Questions

Brian Dietzen and Michael Weatherly in 'NCIS'

‘NCIS’: Why Brian Dietzen Would Love to Write for Gibbs, Tony & More Characters Who Have Left

Brian Dietzen in 'NCIS' - 'Unusual Suspects'
Q&A

‘NCIS’: Brian Dietzen Reflects on Jimmy’s Journey & Talks Reaching Episode 450

Gary Cole and Brian Dietzen in 'NCIS'
Q&A

‘NCIS’: Brian Dietzen on Writing Parker as ‘a Man on Fire’

Gary Cole as Special Agent Alden Parker in NCIS
Spoiler Alert

‘NCIS’ Boss on Parker’s Situation With the Raven and Palmer & Knight’s Relationship

Katrina Law as NCIS Special Agent Jessica Knight and Brian Dietzen as Jimmy Palmer in NCIS
Spoiler Alert

‘NCIS’: Brian Dietzen Promises the Finale Will Reveal ‘a Direction’ for Palmer & Knight

Katrina Law as NCIS Special Agent Jessica Knight and Brian Dietzen as Jimmy Palmer in NCIS

‘NCIS’: Palmer & Knight’s Romance Put on Hold, Plus Ducky Returns (PHOTOS)

Wilmer Valderrama, Gary Cole, Sean Murray in NCIS
Finale

‘NCIS’ Boss Teases the Season 19 Finale: ‘Gibbs’ Energy Permeates the Story’

Sean Murray as Timothy McGee, Gary Cole as Alden Parker in NCIS
Spoiler Alert

‘NCIS’ Reveals Parker’s Juvie Past & Teases a Possible New Couple (RECAP)

Brian Dietzen as Jimmy Palmer, Diona Reasonover as Kasie Hines in NCIS
Spoiler Alert

‘NCIS’ Delivers Its Best Episode of the Season & Sets up a New Mystery (RECAP)

Brian Dietzen as Medical Examiner Jimmy Palmer, Elle Graper as Victoria Palmer in NCIS
Preview

‘NCIS’: Brian Dietzen Previews Danger in Real Time in Episode He Co-Wrote

Diona Reasonover as Kasie Hines, Brian Dietzen as Jimmy Palmer in NCIS

‘NCIS’: Can Meredith Eaton’s Carol Wilson Save Palmer & Kasie? (PHOTOS)

Sean Murray, Rocky Carroll, Brian Dietzen, Mark Harmon in NCIS

How Is ‘NCIS’ Handling the Aftermath of Gibbs’ Exit? (POLL)

Wilmer Valderrama as Torres in NCIS
Spoiler Alert

‘NCIS’: Torres Painfully Faces Gibbs Leaving the Team — and Him (RECAP)

Sean Murray, Wilmer Valderrama, Gary Cole, Rocky Carroll, Katrina Law in NCIS
Spoiler Alert

‘NCIS’ Takes an Important Step Toward Becoming a Team Without Gibbs (RECAP)

Rocky Carroll as NCIS Director Leon Vance in NCIS
Spoiler Alert

How ‘NCIS’ Continues to Keep Gibbs Part of the Story (RECAP)

Joe Spano, Pauley Perrette, Mark Harmon, Meredith Eaton in NCIS

‘NCIS’: Meredith Eaton Is Returning in Season 19 — What Brings Her Back?

Diona Reasonover as Forensic Scientist Kasie Hines, Katrina Law as NCIS Special Agent Jessica Knight in NCIS
Spoiler Alert

‘NCIS’: How Gibbs’ Absence Affects a Major Decision for Kasie (RECAP)

Gary Cole as Parker in NCIS

Gary Cole’s Parker Officially Takes Over as the New ‘NCIS’ Boss in Sneak Peek (VIDEO)

Gary Cole, Sean Murray, Katrina Law, Wilmer Valderrama in NCIS
Spoiler Alert

Who Takes Over as Team Leader in the First ‘NCIS’ Without Gibbs? (RECAP)

NCIS Season 18 Episode 7 Gibbs Mask Crime Scene

‘NCIS’ Moves Into COVID Times as McGee Returns to the Field (PHOTOS)

Victoria Platt Mark Harmon Brian Dietzen NCIS Season 18 Premiere

‘NCIS’: Dr. Jimmy Palmer’s in for a Headache in the Season 18 Premiere (PHOTOS)

NCIS Season 17 Episode 19 Blarney
Preview

‘NCIS’ Director Rocky Carroll Teases Jimmy & Kasie ‘Negotiate for Their Lives’

NCIS Season 17 Episode 19 Blarney

Can Gibbs Get Hostages Jimmy & Kasie Out Alive on ‘NCIS’? (VIDEO)

NCIS Season 17 Ziva Tony Reunion Update
Spoiler Alert

‘NCIS’ Offers an Update on Ziva’s Reunion With Tony & Tali in Paris

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Behind the Scenes of ‘NCIS’ Season 17 (PHOTOS)

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‘NCIS’ Star Brian Dietzen Opens Up About Season 16 Without Pauley Perrette

ncis-cast-gallery

‘NCIS’ Celebrates 350 Episodes — See How the Cast Has Changed (PHOTOS)