The Olsen Dynasty: Meet All 6 Siblings Of Mary-Kate And Ashley (Including The MCU Star And The Secretive Half-Brother)

For decades, the names Mary-Kate and Ashley Olsen have been synonymous with twin stardom, a childhood empire, and a high-fashion sensibility. However, as of December 2025, the biggest surprise for many fans is the sheer size of the Olsen family, which extends far beyond the famous fashion designers and their equally famous younger sister, Elizabeth Olsen. The truth is, the Olsen twins are part of a sprawling family of six siblings, each pursuing their own unique path, from Hollywood blockbusters to behind-the-scenes writing and modeling.

The Olsen family dynamic is a fascinating study in celebrity, privacy, and blended families. While Mary-Kate and Ashley have famously retreated from the public eye to focus on their luxury brand, The Row, their siblings—both full and half—have navigated the spotlight with varying degrees of success and secrecy. This is the complete, up-to-date breakdown of the entire Olsen sibling clan.

The Complete Olsen Family Tree: Six Siblings, Two Marriages

The Olsen family is a blended unit, stemming from the marriage and subsequent divorce of their parents, David "Dave" Olsen and Jarnette "Jarnie" Olsen (née Jones). Dave and Jarnette had four children together before divorcing in 1996. David later married McKenzie Olsen (née Taylor), with whom he had two more children, creating the full roster of six siblings.

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Here is the full biographical profile of the six Olsen siblings, from oldest to youngest:

• James Trent Olsen (Trent)
  • Relationship to Twins: Older Brother (Full Sibling)
  • Parents: David Olsen and Jarnette Olsen
  • Born: May 30, 1984
  • Current Career: Writer, Artist, Comic Book Creator
• Mary-Kate Olsen
  • Relationship to Siblings: Twin Sister (Full Sibling)
  • Parents: David Olsen and Jarnette Olsen
  • Born: June 13, 1986
  • Current Career: Co-Founder of The Row and Elizabeth and James (Fashion Designer)
• Ashley Fuller Olsen
  • Relationship to Siblings: Twin Sister (Full Sibling)
  • Parents: David Olsen and Jarnette Olsen
  • Born: June 13, 1986
  • Current Career: Co-Founder of The Row and Elizabeth and James (Fashion Designer)
• Elizabeth Chase Olsen (Lizzie)
  • Relationship to Twins: Younger Sister (Full Sibling)
  • Parents: David Olsen and Jarnette Olsen
  • Born: February 16, 1989
  • Current Career: Actress (Known for Scarlet Witch in the MCU)
• Courtney Taylor Olsen (Taylor)
  • Relationship to Twins: Younger Half-Sister
  • Parents: David Olsen and McKenzie Olsen
  • Born: May 10, 1997
  • Current Career: Actress, Model
• Jacob "Jake" Olsen
  • Relationship to Twins: Younger Half-Brother
  • Parents: David Olsen and McKenzie Olsen
  • Born: 1998
  • Current Career: Private, Former Model

The Four Full Siblings: From Full House to the MCU

The four children from David and Jarnette's first marriage are the most well-known, primarily due to the massive childhood fame of the twins and the subsequent Hollywood success of their youngest sister. This quartet of siblings has a unique bond, with the older ones often looking out for the younger ones, particularly in the cutthroat world of show business.

James Trent Olsen: The Creative, Private Elder Brother

James Trent Olsen, known simply as Trent, is the oldest sibling in the Olsen clan. Born in 1984, he is two years older than the twins.

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Trent had a few small, uncredited roles in his sisters' early video productions, such as The Case of the Mystery Cruise (1995) and Our First Video (1993).

However, unlike his sisters, he chose a path largely away from the spotlight. Trent pursued a career as a writer, artist, and comic book creator, focusing on his passion for graphic novels and the art world.

The twins’ success arguably influenced Trent’s career, as he’s known to have a strong relationship with all his siblings, often attending events to support them before retreating to his private life in California. He remains the most private of the four full siblings.

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Elizabeth Olsen: The Sister Who Forged Her Own Path

Elizabeth Chase Olsen, affectionately known as "Lizzie," is the youngest of the full siblings. Born in 1989, she is three years younger than Mary-Kate and Ashley.

Lizzie initially tried to distance herself from the "Olsen twin sister" label, even considering using her middle name, Chase, to carve out her own identity in Hollywood.

Her strategy worked, and she became a massive global star on her own terms, most famously for playing Wanda Maximoff, or the Scarlet Witch, in the Marvel Cinematic Universe (MCU).

In recent interviews, Elizabeth has spoken about the unique partnership and privacy of her twin sisters, stating that she admires the "partnership that they have and doesn't compete with it." She also revealed that her sisters were "forced" to support her career, a testament to the close, if private, family bond.

The twins even honored their older brother and younger sister by naming their contemporary fashion line, Elizabeth and James, after them, a clear nod to the importance of their siblings in their lives.

The Two Half-Siblings: Courtney Taylor and Jake Olsen

Following the divorce of David and Jarnette Olsen in 1996, David married McKenzie Olsen. This second marriage resulted in two more children, who are the half-siblings to Mary-Kate, Ashley, Trent, and Elizabeth. These two siblings are the least known to the public, maintaining a much lower profile than their famous older family members.

Courtney Taylor Olsen: The Emerging Actress and Model

Courtney Taylor Olsen, born in 1997, is the older of the two half-siblings. She shares the same father, David Olsen, but a different mother, McKenzie Olsen.

Courtney has shown an interest in following her sisters' footsteps into the entertainment industry, having pursued acting and modeling.

Her credits include appearances in films such as Malignant Spirits: Sense of Fiction, BNow!, and YOLO: The Movie. She is known to be highly supportive of her older siblings, often sharing her admiration for them on social media.

Despite her connections, Courtney Taylor maintains a relatively private life compared to the intense scrutiny the twins and Elizabeth face, successfully balancing her career ambitions with a desire for normalcy.

Jake Olsen: The Youngest and Most Private Olsen

Jake Olsen, born in 1998, is the youngest of all six Olsen siblings. He is the son of David and McKenzie Olsen and is the half-brother to the four older children.

Jake is arguably the most elusive member of the Olsen dynasty. He had a brief foray into the public eye in 2016 when he pursued a short career as a model, posing for various editorials.

Since then, Jake has largely stepped away from the entertainment world, choosing to live a life completely out of the celebrity spotlight. Information about his current career or pursuits is scarce, reinforcing the family's overall preference for privacy.

The Olsen Legacy: Privacy and Support

The extensive Olsen family tree reveals a complex, yet seemingly unified, support system. The four full siblings, Mary-Kate, Ashley, Trent, and Elizabeth, grew up together, forming a tight-knit bond that has endured their parents' divorce and the pressures of fame.

The twins' decision to step away from acting and build a fashion empire, Dualstar and The Row, was a conscious choice to prioritize their privacy and creative control.

Elizabeth Olsen's recent comments confirm that despite their extreme levels of fame, the siblings remain close, with a deep, unspoken understanding of the unique challenges that come with the Olsen name. The six Olsen siblings—Trent, Mary-Kate, Ashley, Elizabeth, Courtney Taylor, and Jake—are a testament to a family that values discretion and mutual support above all else, regardless of whether they share the same mother or are separated by years and career paths.

The question of "Do the Olsen Twins have siblings?" is not just a simple yes or no; it’s an opportunity to explore one of Hollywood’s most fascinating and private family dynasties, a story that includes a comic book writer, a fashion mogul, a Marvel superhero, and two emerging, yet private, half-siblings.