Is 'Lost Girls' Based on a True Story - Netflix Tudum

  • Deep Dive

    ‘Lost Girls’ and the Gilgo Beach Serial Killings. What to Know About the Movie

    Academy Award nominee Amy Ryan stars as a mother searching for her missing daughter, a suspected LISK victim.

    By Ingrid Ostby
    March 5, 2024

After her daughter goes missing, one woman’s relentless efforts to find her child uncover a wave of unsolved murders on Long Island. Based on real events about a purported serial killer and the woman who set out to find his victims, the 2020 film Lost Girls is the narrative feature debut of Emmy winner and Academy Award-nominated documentary filmmaker Liz Garbus (The Fourth EstateWhat Happened, Miss Simone?). 

Popular Now

When will Lost Girls be released?

Stream it now.

Where can I find the trailer for Lost Girls?

Check it out below.

Who’s in Lost Girls?

  • Amy Ryan (Beau Is Afraid, Only Murders in the Building) as Mari, Shannan’s mom
  • Thomasin McKenzie (Last Night in Soho, Jojo Rabbit) as Sherre, Mari’s middle child
  • Oona Laurence (The Beguiled, Southpaw) as Sarra Gilbert, Mari’s youngest daughter
  • Gabriel Byrne (War of the Worlds, Maniac) as Long Island Police Commissioner Richard Dormer
  • Lola Kirke (Winning Time: The Rise of the Lakers Dynasty) as Kim, the sister of a missing woman named Amber

What happens in Lost Girls?

After a 24-year-old sex worker named Shannan mysteriously disappears one night, her mother, Mari, is determined to find her at all costs. So when the police fail to make Shannan’s disappearance a priority, Mari takes matters into her own hands — driving an investigation within an insular gated community near Long Island’s outer banks. In doing so, Mari’s efforts enable detectives to uncover numerous unsolved murders. 

Is Lost Girls based on a book?

Yes. It’s based on the nonfiction book Lost Girls: An Unsolved American Mystery by Robert Kolker. 

Oona Laurence, Amy Ryan, Thomasin McKenzie and Miriam Shor in ‘Lost Girls’

Oona Laurence, Amy Ryan, Thomasin McKenzie and Miriam Shor in Lost Girls

Jessica Kourkounis/Netflix

Is Lost Girls based on a true story?

Yes. Lost Girls is inspired by the true story of Shannan Gilbert’s disappearance, her mother Mari Gilbert’s efforts to find her, and the Long Island serial killer — or LISK, as he has become known — who is alleged to have killed up to 18 people between the years 1996 and 2011. 

Was the killer in Lost Girls ever found? 

A suspect was arrested and charged in three of the murders in July 2023. 

Where does Lost Girls take place?

Lost Girls takes place on the South Shore of Long Island, New York.

Go Behind the Streams with TudumWith breaking news, exclusive sneak peeks, interviews and more, Tudum helps you dive deeper into the stories you love.
Related Tags

Shop Lost Girls

Go to Netflix Shop

Discover More Deep Dive

  • Harry Jowsey Is Ready to Be Husband Material in Let’s Marry Harry 
    Netflix’s most notorious bachelor is getting serious about finding love. 
  • A new group of couples are now playing house with a trial spouse.
  • Joe Locke, Kit Connor, and more dish on growing up with the beloved franchise.
  • In a powerful monologue, Yasmin Finny gives voice to LGBTQIA+ Pride. 
  • In this series, a young woman grieving her sister receives a surprising gift.
  • Hear from the lead actors about their characters’ fates.
  • The coming-of-age drama takes place during the 1986 FIFA World Cup.

Discover More Drama

  • Plus: Swapped hits a major milestone, and The Hawk swings to a strong debut.
  • Mix and match these films and shows for your in-flight entertainment.
  • The golf comedy series is now streaming.
  • The actor opens up about stepping into one of literature’s most beloved roles.
  • KJ Apa and Diane Guerrero also join the cast of the drama.
  • Plus Ransom Canyon, A Toxic Love Story, The East Palace, Elite Force, and more.