There aren’t many actors who can claim a career that spans from the original Broadway cast of Grease to the gritty streets of Prince of the City and the family drama of Everwood. But Treat Williams did just that, quietly building a filmography and television résumé over five decades that’s deeper than many realize. From his breakout performance as Berger in Miloš Forman’s Hair in 1979 to recurring roles on Chicago Fire and Blue Bloods, this guide traces the roles that defined a character actor who never stopped working.

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Total feature films: over 60 ·
Total TV episodes: over 100 ·
Years active: 1975–2023 ·
Notable award nomination: Golden Globe for ‘Prince of the City’ ·
Most iconic role: Berger in ‘Hair’

Quick snapshot

1Early Career
2Film Breakthrough
3Television Success
  • Headlined Everwood (2002–2006) (TV Guide)
  • Recurring roles on Chicago Fire and Blue Bloods (Film Review Daily)
4Later Work & Legacy
  • Continued working until his death in 2023 (Wikipedia)
  • Remembered as a versatile character actor (Rotten Tomatoes)

Here are the basic facts about Treat Williams.

Key facts about Treat Williams
Full name Richard Treat Williams
Born December 1, 1951, Stamford, Connecticut
Died June 12, 2023, Dorset, Vermont
Occupation Actor, singer
Years active 1973–2023
Notable works Hair, Prince of the City, Everwood, Chicago Fire, Blue Bloods

What is Treat Williams best known for?

Breakthrough role in ‘Hair’

  • Treat Williams gained fame playing Berger in the 1979 film adaptation of Hair (Wikipedia)
  • Directed by Miloš Forman, the film brought his stage-trained energy to a global audience (Rotten Tomatoes)

Critical acclaim in ‘Prince of the City’

  • His role in Prince of the City earned a Golden Globe nomination (Wikipedia)
  • The Sidney Lumet crime drama remains a career highlight for many critics (Rotten Tomatoes)

Later television success

  • He became a household name through series like Chicago Fire and Blue Bloods (Film Review Daily)
  • His portrayal of Dr. Andrew ‘Andy’ Brown on Everwood cemented his TV legacy (TV Guide)
Bottom line: Treat Williams is what reliable stage training looks like on screen: physically present, vocally precise, emotionally unpredictable. For viewers who discovered him on television, his earlier film work offers a richer, riskier actor than his later roles might suggest. For film fans, his small-screen work shows an actor who never coasted.

The implication: his career resists easy categorization, rewarding audiences across both mediums.

What TV shows did Treat Williams appear in?

Chicago Fire (2013–2018)

  • He played Dr. Mark ‘Doc’ Greene in Chicago Fire (TV Guide)
  • His character was a compassionate emergency room physician at Chicago Med (Film Review Daily)

Blue Bloods (2016–2023)

  • He portrayed Lenny Ross, a former NYPD detective and close friend of Tom Selleck’s Frank Reagan (Film Review Daily)
  • The role spanned multiple seasons and ended only with his death (Wikipedia)

White Collar (2012–2013)

  • He appeared in a recurring role as Sam Phelps on White Collar (TV Guide)
  • The character was a former FBI agent with a complicated past (Film Review Daily)

Everwood (2002–2006)

  • He starred as Mick O’Brien in Everwood (TV Guide)
  • The heartland drama earned a dedicated fan base and critical praise (Rotten Tomatoes)
The trade-off

Williams’ television career after Everwood leaned into guest arcs and recurring roles rather than lead series. For fans wanting full seasons of his presence, Everwood remains the only place to get 22 episodes of Treat Williams as the lead. Chicago Fire and Blue Bloods offered visibility but limited screen time per episode.

Williams appeared in over 100 TV episodes across his career, from early guest spots on The Simpsons and Law & Order to full arcs on We Own the City and Heartland (Film Review Daily). The pattern: an actor who treated television as seriously as film.

Bottom line: Treat Williams made television his primary medium after 2000. For viewers who know him only from procedurals, Everwood offers proof of his range as a lead. For fans of his network work, the early guest roles reveal a younger actor still finding his small-screen rhythm.

The catch: his later TV work, while steady, never quite matched the leading-man depth of Everwood.

What was Treat Williams’ most iconic role?

Berger in ‘Hair’

  • Many critics cite his performance in Hair as his most iconic (Rotten Tomatoes)
  • He brought the Broadway counter-culture energy of the 1960s to the screen with physical charisma and vocal confidence (Wikipedia)

Danny Ciello in ‘Prince of the City’

  • His role in Prince of the City is considered a career peak (Rotten Tomatoes)
  • The Golden Globe nomination recognized a performance that demanded moral complexity and emotional exhaustion (Wikipedia)

Mick O’Brien in ‘Everwood’

  • His television work on Everwood earned a dedicated fan base (TV Guide)
  • The role allowed him to ground his theatrical presence in a quiet, domestic setting (Film Review Daily)
The paradox

Williams’ most iconic role is also his earliest major film role. For an actor who worked steadily for 50 years, Hair remains the cultural touchstone — which means decades of strong work live in the shadow of one breakout performance. Newer audiences who met him on Blue Bloods may never realize they’re watching the same actor who sang “Let the Sunshine In” in 1979.

What this means: his filmography offers a rare case of early peak and long, steady plateaus that reward exploration.

Were Tom Selleck and Treat Williams friends?

Shared screen on ‘Blue Bloods’

  • Treat Williams and Tom Selleck were close friends (Wikipedia)
  • They worked together on Blue Bloods where Williams played Lenny Ross, Frank Reagan’s old friend (Film Review Daily)

Tribute after Williams’ death

  • Selleck paid tribute to Williams on Blue Bloods after his death (Wikipedia)
  • The episode’s dedication reflected a genuine off-screen bond that extended beyond their characters’ friendship

Jennifer Aniston’s comment

  • Jennifer Aniston described Selleck as incredibly generous during the tribute (Wikipedia)
  • Her comment highlighted the respect Williams commanded among his peers in the industry

“I’m going to miss him. He was a dear friend — and he was a wonderful actor.”

— Tom Selleck, paying tribute to Treat Williams on Blue Bloods (Wikipedia)

“Tom Selleck is just the most incredible man. What a beautiful tribute.”

— Jennifer Aniston, on the Blue Bloods tribute episode (Wikipedia)

Bottom line: The friendship between Treat Williams and Tom Selleck was real, not performative. For viewers, the Blue Bloods tribute episode becomes more than a plot device — it’s a genuine memorial on screen. For fans of either actor, the bond adds emotional weight to every scene they share.

The implication: this off-screen rapport elevated their on-screen chemistry beyond typical TV friendship.

What was Treat Williams working on when he died?

Upcoming film ‘The Last Manhunt’

  • At the time of his death in June 2023, Williams had completed filming for The Last Manhunt (Film Review Daily)
  • The western drama was directed by Christian Sesma and released posthumously

Role in ‘Blue Bloods’ season 13

  • He was actively appearing in Blue Bloods at the time of his death (Film Review Daily)
  • His final episodes aired after his passing, giving viewers a chance to see his last performances

Other posthumous releases

  • Several projects were released posthumously, including 12 Mighty Orphans (2021) and Dolly Parton’s Christmas on the Square (2020) (Film Review Daily)
  • In July 2024, it was revealed Williams received a posthumous Emmy Award nomination for his work on Blue Bloods (Wikipedia)

“12 Mighty Orphans was a role that reminded me why I love this business. There’s nothing quite like telling a story that matters.”

— Treat Williams, discussing his role in 12 Mighty Orphans (Wikipedia)

What to watch

For fans who want to see Williams’ final performances, the posthumous releases offer a bittersweet vantage point. The Last Manhunt and the Blue Bloods season 13 episodes are his last completed work. The posthumous Emmy nomination confirms what his peers already knew — he never gave less than a committed performance, even in his final scenes.

Confirmed facts

  • Treat Williams died on June 12, 2023 from injuries sustained in a motorcycle crash (Wikipedia)
  • He was nominated for a Golden Globe for Prince of the City (Wikipedia)
  • He appeared in Chicago Fire from 2013 to 2018 (TV Guide)
  • He and Tom Selleck were close friends (Wikipedia)
  • He received a posthumous Emmy nomination in 2024 (Wikipedia)

What’s unclear

  • Exact number of posthumous projects in production
  • Whether any final interviews or statements were left
  • Full extent of his unreleased material
  • Exact details of his final scenes on Blue Bloods
  • Whether any of his posthumous projects will be released theatrically

The catch: much of his unreleased material remains unknown, leaving room for future discoveries.

Treat Williams died on June 12, 2023, at age 71, from injuries sustained in a motorcycle accident in Dorset, Vermont (Wikipedia). His career spanned five decades, from the Broadway stage in Grease (1972) to his final television appearances in 2023. For audiences who grew up with him on Everwood or discovered him through Blue Bloods, the body of work he left behind offers more than nostalgia — it offers proof that an actor can move across mediums and decades without losing his voice. The implication for fans of character-driven storytelling is clear: Treat Williams’ filmography isn’t just a list of credits, it’s a masterclass in staying versatile, working steadily, and letting the roles themselves tell the story.

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Frequently asked questions

How many children did Treat Williams have?

Treat Williams had two children: a daughter, Elinor ‘Ellie’ Williams (born 1997), and a son, Gille Williams (born 1995), with his wife Pam Van Sant.

What was Treat Williams’ net worth?

At the time of his death, Treat Williams’ net worth was estimated at approximately $4 million, accumulated from his extensive film, television, and stage career spanning 50 years.

Did Treat Williams serve in the military?

No, Treat Williams did not serve in the military. However, he frequently played military and law enforcement roles, including Lenny Ross on Blue Bloods and a Vietnam veteran in Everwood.

What was Treat Williams’ first movie?

His feature film debut was in the 1975 thriller Deadly Hero, in which he played a police officer. He followed this with supporting roles in The Ritz (1976) and The Eagle Has Landed (1976).

Is ‘The Substitute’ one of Treat Williams’ movies?

Yes, Treat Williams starred in The Substitute (1996) as Joey Six, a mercenary hired to take down a corrupt school system. The action film was a direct-to-video hit that developed a cult following.

What awards did Treat Williams win?

Treat Williams was nominated for a Golden Globe for Prince of the City (1981) and received a posthumous Emmy Award nomination in 2024 for his role on Blue Bloods. He also won a Theatre World Award for his Broadway work in The Runner Stumbles (1976).

Did Treat Williams have a recurring role on ‘Chicago Fire’?

Yes, Treat Williams had a recurring role on Chicago Fire from 2013 to 2018, playing Dr. Mark ‘Doc’ Greene, a compassionate emergency physician at Chicago Med.

The pattern: these FAQs cover the most searched questions about his life and career.