How long has Mariska Hargitay been on SVU? As of September 2026, Hargitay has played Olivia Benson on Law & Order: Special Victims Unit for nearly 27 years. She joined the series when it premiered on September 20, 1999, and remains its central star as the show prepares for Season 28.
Hargitay’s run is remarkable because she has stayed with the same character from the show’s beginning. Olivia Benson started as a detective and eventually became the captain of the Special Victims Unit. Over 27 seasons, the character has experienced major professional and personal changes while remaining at the heart of the series.
With Season 27 now completed and Season 28 scheduled to begin October 8, 2026, Hargitay’s time on SVU is approaching another major milestone. The upcoming season will also take the series toward its 600th episode.
Mariska Hargitay Joined SVU in 1999
Mariska Hargitay has been part of Law & Order: SVU since its very first episode. The series premiered on September 20, 1999, with Hargitay starring as Detective Olivia Benson.
At the time, Benson was a relatively young detective working in the NYPD’s Special Victims Unit. Her partnership with Elliot Stabler, played by Christopher Meloni, became one of the defining relationships of the early seasons.
Hargitay’s portrayal quickly established Benson as a character who combined investigative determination with empathy for victims. That combination became an important part of the show’s identity.
Unlike many television characters who eventually disappear when an actor leaves a long-running series, Benson remained throughout the show’s evolution. Hargitay became the one constant presence viewers could rely on as the cast and creative team changed around her.
That consistency is a major reason her tenure stands out in television history.
Nearly 27 Years of Olivia Benson
As of September 15, 2026, Hargitay has been playing Olivia Benson for approximately 26 years and 11 months.
She will reach the 27-year mark on September 20, 2026, exactly 27 years after SVU first premiered.
That means Hargitay has spent almost three decades portraying the same fictional character. During that period, SVU has remained in continuous production and has grown into the longest-running primetime live-action drama in American television history.
The scale of that achievement becomes clearer when looking at the show’s longevity. Many television dramas change their leading characters, end after several seasons, or disappear for years before returning.
SVU has done none of those things.
Instead, the series has continued producing new seasons while Hargitay has remained at its center.
From Detective to Captain
One of the most significant aspects of Hargitay’s long tenure is that Olivia Benson has not remained professionally static.
When viewers first met Benson, she was a detective. Over the years, she took on increasing responsibility within the NYPD and eventually became the commanding officer of the SVU.
Benson was promoted to lieutenant during the show’s 17th season. She later became captain during Season 21.
That progression allowed Hargitay to portray a character growing older and more experienced instead of repeatedly returning to the same professional starting point.
Benson’s development has also changed the way she approaches cases. Her years working with victims have shaped her leadership style, while her experience has made her one of the most recognizable figures in the Law & Order franchise.
Peacock continues to identify Hargitay as the performer behind Captain Olivia Benson, who leads the Special Victims Unit.
She Is the Only Original Cast Member Still on SVU
Hargitay’s longevity becomes even more impressive when considering how much the cast has changed.
The original series included Hargitay as Olivia Benson, Christopher Meloni as Elliot Stabler, Dann Florek as Donald Cragen, Richard Belzer as John Munch, Michelle Hurd as Monique Jeffries and Dean Winters as Brian Cassidy.
Over time, most of those original performers left the regular cast.
Hargitay remained.
That makes her the only original cast member still carrying the series from its first season into its upcoming 28th season. Peacock’s current cast information continues to list her as Olivia Benson.
Her continued presence also gives SVU a direct connection to its 1999 beginning. Viewers who watched the premiere can still watch the same lead performer in the latest episodes.
How Many Seasons Has Mariska Hargitay Appeared In?
Hargitay has appeared in all 27 completed seasons of Law & Order: SVU.
Season 27 premiered in September 2025 and concluded in May 2026. Hargitay returned as Captain Benson throughout the season.
The series has already been renewed for Season 28, and Hargitay is returning.
That means her tenure will continue beyond 27 seasons.
Season 28 is scheduled to premiere on NBC on October 8, 2026. Hargitay will once again lead the cast as Benson.
So, in practical terms, she has completed 27 seasons and is entering her 28th season on the series.
Why Her SVU Record Is So Significant
Hargitay’s run is not simply about staying employed on a successful television show. Her character has become one of the longest-running leading roles in American scripted television.
When Hargitay entered her 23rd season as Benson in 2021, the character surpassed the previous record for longevity among primetime live-action scripted characters.
That record reflects both Hargitay’s commitment and the unusual structure of SVU. The series has been able to keep its central character relevant while allowing her professional responsibilities and relationships to evolve.
Benson has moved from detective to captain without losing the qualities that originally made her popular.
Her longevity has also helped make the character synonymous with SVU. For many viewers, Benson is the first person they associate with the series.
Hargitay’s Role Has Extended Beyond Acting
Hargitay’s connection to SVU has also developed beyond simply appearing on screen.
Over the years, she has become an executive producer on the series while continuing to portray Benson. Her involvement gives her a greater role in the show’s creative direction.
Her work connected to issues involving survivors of sexual violence has also become an important part of her public career.
The fictional Benson is deeply committed to supporting victims, while Hargitay has pursued advocacy work outside the show. That connection has helped give the character additional significance for audiences.
Her long association with the subject matter has also made her one of the most recognizable advocates connected to a major television crime drama.
Season 28 Will Extend the Record
Hargitay’s SVU journey is not ending in 2026.
NBC has renewed the series for a 28th season, with Hargitay returning as Benson. The new season is scheduled to premiere October 8, 2026.
That upcoming season will also bring the series closer to another historic milestone: its 600th episode. The milestone is expected during Season 28.
The timing makes the upcoming season particularly notable. Hargitay will enter another season of the show just weeks after celebrating 27 years since the series premiere.
Her continued involvement means the character of Olivia Benson will remain central as the drama enters its fourth decade on television.
Could Mariska Hargitay Reach 30 Seasons?
The possibility of Hargitay reaching 30 seasons has already been discussed publicly.
In April 2026, Hargitay said she could see SVU reaching 30 seasons. The show had already been renewed for Season 28 at that point.
That does not guarantee that the series will reach Season 30, but it does show that Hargitay is not currently treating the end of the show as an immediate concern.
Recent reporting has also indicated that she considered leaving around Season 25 but ultimately decided she was not ready to walk away from Benson.
For fans, that distinction matters. Hargitay is not simply returning because the character has become inseparable from the series. She has continued to express enthusiasm about playing Benson.
Her 2026 Television Milestone
Hargitay’s remarkable year has extended beyond SVU.
In September 2026, she hosted the 78th Primetime Emmy Awards, marking another major television milestone in a career already closely associated with the Emmys.
She also received two Creative Arts Emmy Awards for her documentary My Mom Jayne, which explores the life of her mother, actress Jayne Mansfield.
Even with those additional projects, Hargitay continues to be identified most strongly with Olivia Benson.
Her 2026 Emmy hosting appearance even included a return to the Benson character, bringing the SVU role into one of television’s biggest annual events.
How Long Will Mariska Hargitay Stay on SVU?
There is currently no indication that Hargitay is leaving Law & Order: SVU before Season 28.
Her return is confirmed, and the new season will continue Benson’s story. Beyond that, her comments about potentially reaching Season 30 suggest that she remains open to continuing if the series and character remain creatively satisfying.
Still, future seasons beyond Season 28 should not be treated as guaranteed until NBC officially renews the show.
For now, the facts are straightforward: Hargitay has been playing Olivia Benson since September 1999, has completed 27 seasons, and is preparing to begin her 28th season.
The Bottom Line
So, how long has Mariska Hargitay been on SVU? As of September 15, 2026, she has portrayed Olivia Benson for nearly 27 years, beginning with the show’s premiere on September 20, 1999. She has appeared throughout all 27 completed seasons and will return for Season 28 in October 2026.
Her journey from detective to captain has unfolded alongside the growth of Law & Order: SVU itself. Hargitay has remained the show’s defining constant through cast changes, new leadership, evolving storylines and multiple television eras.
With Season 28 approaching and the 600th episode on the horizon, her remarkable run is still continuing.
What is your favorite Olivia Benson moment from Hargitay’s nearly 27-year run on SVU? Share your thoughts in the comments and stay updated on the latest developments.