Sign in

Who is Sophia Maddox? Charles Manson's granddaughter uncovers family secret in chilling new documentary

My Grandfather Charles Manson follows filmmaker Sophia Maddox's journey after a DNA discovery revealed she is the biological granddaughter of Charles Manson.

Published on: Jul 22, 2026, 14:28:22 IST
Share
Share via
  • facebook
  • twitter
  • linkedin
  • whatsapp
Copy link
  • copy link

Sophia Maddox, a Los Angeles-based filmmaker and actress, is stepping into the spotlight with a deeply personal documentary that explores one of the most shocking family discoveries imaginable.

Sophia Maddox is a 26-year-old Los Angeles-based actress and filmmaker. According to People, her family's story changed after her father, Daniel Arguelles, confirmed through DNA testing that Charles Manson was his biological father. (Sophia Maddox | Instagram)
Sophia Maddox is a 26-year-old Los Angeles-based actress and filmmaker. According to People, her family's story changed after her father, Daniel Arguelles, confirmed through DNA testing that Charles Manson was his biological father. (Sophia Maddox | Instagram)

Her new Hulu documentary, My Grandfather Charles Manson, premieres on July 22 and chronicles how she learned that convicted murderer and cult leader Charles Manson was her biological grandfather. The film follows her search for answers as she understands the lasting impact of one of America's most infamous criminal legacies.

The documentary arrives years after Maddox's father, Daniel Arguelles, uncovered the family connection through DNA testing.

Also read: Paul Caneiro family: Where are Susan, Katelyn, Marissa now? Latest update as Dateline turns focus on Colts Neck murder

Who is Sophia Maddox?

Sophia Maddox is a 26-year-old Los Angeles-based actress and filmmaker. According to People, her family's story changed after her father, Daniel Arguelles, confirmed through DNA testing that Charles Manson was his biological father.

Maddox has said she first learned about the discovery after returning home from a flight during which she contracted COVID-19. While speaking to her father over the phone, he revealed he believed he had identified his biological father.

"It just popped up," Maddox recalled. “He said, 'I think I found out who my dad is. And if it's true, it's really dark.'”

Arguelles, who was raised by his mother and stepfather, never knew the identity of his biological father. In 2015, he submitted his DNA to a genealogy website. Years later, he matched with Michael Brunner, one of Charles Manson's known sons, on Ancestry.com. Further DNA testing confirmed the biological connection in 2022.

At the time, Maddox knew little about her family's history. Her main reference point was Quentin Tarantino’s 2019 film Once Upon a Time… in Hollywood, which reimagines the events surrounding Charles Manson and the Manson Family's infamous 1969 Tate–LaBianca murders.

Maddox has since formed a relationship with Brunner while continuing to explore the hidden chapters of her family's history.

Also read: Who is Jared Scheierl and where is he now? Survivor who helped crack Jacob Wetterling case returns in ABC's 20/20

What is My Grandfather Charles Manson about?

My Grandfather Charles Manson focuses on Maddox's personal journey after learning the truth about her ancestry.

The documentary follows her conversations with former members of the Manson Family, including Lynette "Squeaky" Fromme, who was portrayed by Dakota Fanning in Quentin Tarantino's Once Upon a Time... in Hollywood. Maddox said she wanted to hear directly from people who knew Manson instead of relying only on media accounts or courtroom narratives.

"I was interested in hearing from people who knew him, not the media's interpretation, not a prosecutor's interpretation," she told People. "I've gathered my own opinions on him."

The impact of the news on her relationship with her father is also explored in the movie. Maddox claims that although learning the truth caused an emotional rift between them, it eventually helped her comprehend the true history of her family.

"I'm grateful to have uncovered my family's truth, not just the sensational ones," she remarked.

Charles Manson and the Manson family crimes

Charles Manson became one of America's most notorious criminals after directing followers of the Manson Family cult to carry out the 1969 Tate-LaBianca murders.

The chain of murders committed by Charles Manson claimed nine lives, including actress Sharon Tate, who was eight months pregnant. Although Manson did not personally commit the killings, he was convicted in 1971 of first-degree murder and conspiracy to commit murder.

His death sentence was later commuted to life imprisonment after California temporarily abolished capital punishment. He died in prison in 2017 at the age of 83.

  • Shirin Gupta
    ABOUT THE AUTHOR
    Shirin Gupta

    Shirin Gupta is a content producer with the Hindustan Times. She covers everything between politics, entertainment and sports at the US desk. Shirin got interested in political journalism during her time as a web editor at her college newspaper NCC News in Syracuse when she first started seeing the effects of national politics in life of her fellow colleagues. Shirin has worked on a wide range of fast-moving and developing stories locally when she was at NCC editing accessible reports for the audience. Her current role requires her to track real-time updates, verify information and present balanced coverage across diverse beats. Covering US politics from an international newsroom perspective has further deepened her understanding of how domestic decisions can have far-reaching global consequences. With a keen interest in international affairs, Shirin continues to build her expertise in geopolitics, policy shifts, and cross-border developments. She aims to learn and evolve her reporting in matters of geopolitics and international issues. Outside the newsroom Shirin writes about books and music for her personal blog. She is an avid consumer of pop culture and reveres literature.Read More

Oscars 2024: From Nominees to Red Carpet Glam! Get Exclusive Coverage on HT. - Click Here!

Get more updates from Bollywood, Hollywood, Music and Web Series along with Latest Entertainment News at Hindustan Times.