Mark Zuckerberg’s 3 Siblings: All About the Meta CEO’s Sisters Randi, Donna and Arielle

Only one of Mark Zuckerberg’s siblings doesn’t work in tech

Mark Zuckerberg grew up surrounded by “smart, strong women” — namely, his three sisters: Randi, Donna and Arielle.

The co-founder of Facebook and his siblings were raised in a “tight-knit” family, Donna told New York Magazine in May 2012. Their parents, Edward Zuckerberg and Karen Kempner-Zuckerberg, supported their future ambitions even when it didn’t involve them going into the medical field.

“To their credit, they never once pushed any of us into medicine,” Randi said on the CNN podcast The Human Code with Laurie Segall in February 2019. “I think somewhere inside, they knew the careers that we would have didn’t even exist yet.”

Such was the case for the Zuckerbergs’ only son, Mark, who created the first social media platform while a student at Harvard and became the world’s youngest self-made billionaire at the age of 23. His sisters are all equally accomplished, with careers spanning the industries of technology, media and academia and accolades ranging from Tony Awards to spots on the Forbes 30 Under 30.

“I grew up with three sisters and they taught me to learn from smart, strong women,” Mark wrote on Instagram in March 2017. “They weren’t just my sisters but some of my best friends. …
They showed me how to compete and still laugh together afterwards.”

From their childhood together to their adult lives, here is everything to know about Mark Zuckerberg’s sisters: Randi, Donna and Arielle.

Mark and his siblings grew up in a creative home

Mark is one of four children born to Edward Zuckerberg and Karen Kempner-Zuckerberg. The couple welcomed their first child, daughter Randi, in 1982, followed by Mark in 1984, Donna in 1987 and Arielle in 1989.

Mark and his three sisters were raised in Dobbs Ferry, N.Y., where their father ran a dental practice with their mother, who also practiced psychiatry.

“We were that super geeky, nerdy household,” Randi said about their childhood on The Human Code, adding that she and her siblings clocked “many hours of Nintendo.”

She continued, “We were always up to something creative. We were always inventing, we were always collaborating. We were always looking for any technology we could find and using it to create something bigger.”

Mark and Randi attended Harvard University together

Randi enrolled in Harvard University in 1999 with plans to major in music. However, she was rejected by the music department and switched gears to studying psychology, The New York Times reported.

In 2002, Mark joined her at Harvard. The siblings studied together for one year before Randi graduated in 2003 with her bachelor’s degree in psychology. (Mark eventually dropped out in 2005.)

“I don’t know if Mark and I ever talked about our feelings, but we overlapped at Harvard and hung out a lot,” Randi told The New York Times, adding that they were “as close as a brother and sister could be.”

Randi worked with Mark at Facebook for six years

After beginning her career as a production assistant on the television show Forbes on Fox, Randi joined her younger brother Mark at Facebook in 2005. She was one of the first dozen employees at the social media startup — and was personally recruited by her brother to sign on.

“He actually called up my mom and said, ‘I’m concerned Randi is in a dead-end career,’ ” Randi told The New York Times. “He finally said: ‘Randi, come out to the office. I think you’ll like it.’ ”

Randi moved to Palo Alto and spent six years as Facebook’s director of market development and spokesperson. However, in 2011, she decided to leave her brother’s company — which had developed “a culture that left no room for personal passions,” she wrote in an essay for Vogue — and move back to New York to pursue her own creative ventures.

Since leaving Facebook, Randi started her own marketing and production company, Zuckerberg Media, in 2011. Two years later, she wrote the children’s book Dot. about a tech-savvy little girl, and went on to appear in the 2016 Oxygen docuseries Quit Your Day Job.

More recently, Randi co-founded the online art community HUG in 2022, and she currently hosts her own podcasts on SiriusXM, including Randi Zuckerberg Means Business and Crypto Cafe with Randi Zuckerberg.

Mark’s youngest sister, Arielle, also works in tech

Arielle, the youngest Zuckerberg sibling, also pursued a career in tech. After studying psychology and computer science at Claremont McKenna College in Claremont, Calif., she worked as a product manager at tech startups and companies, including Wildfire Interactive, Google and Humin.

“Technology was a huge part of the environment I grew up in,” Arielle told Medium in June 2016. “My father always had the most cutting-edge technology in his dental office, and he taught my brother how to code in middle school.”

But, at the advice of her older sister Randi, Arielle never went to work for her brother Mark at Facebook. Instead, she focused on establishing her own name and reputation in the world of technology.

Arielle now works as a venture capitalist — currently as a general partner at Long Journey Ventures, where she invests in technology startups. In 2019, she was named one of Forbes’ 30 under 30 in the world of venture capital.

Donna is a writer, editor and scholar of classics

Donna is the only Zuckerberg sibling to not pursue a career in the tech sector. Instead, she holds a Ph.D. in classics from Princeton University — and has written a book and published an award-winning online publication on the topic.

“With us, our parents always supported what it was we wanted to do,” Donna told New York Magazine about her and her siblings’ career paths. “They just asked that we do our best at it.”

Donna published her book, Not All Dead White Men: Classics and Misogyny in the Digital Age, in 2018. She was also editor-in-chief of the online classics publication Eidolon from 2015 to 2020, per her website.

In addition, her writing has appeared in The Washington Post, BBC News and Jezebel. Donna currently shares her essays in a Substack newsletter called Myth Takes.

Randi, Donna and Arielle have six children, collectively

Mark is an uncle several times over, thanks to his sisters’ kids.

Randi and her husband, product executive Brent Tworetzky, married in May 2018. They have three children together and are raising their family in New York.

“That was the real decision-maker for us because I thought, ‘Wow, what an amazing city this is that you can be in tech and business, and singing on Broadway, and [have] all of this culture and all of this art and business right at your fingertips in the same place,’ ” Randi told New York Family in March 2016 about moving back east.

Meanwhile, Donna is a mom of two children.

More recently, Arielle gave birth to her first child in January 2024. She’s been married to her husband, Andrew Jordan, since 2019.

Mark’s six nieces and nephews are around the same age as his three kids with his wife Priscilla Chan: Maxima, August and Aurelia.

Randi is a marathon and ultra-marathon runner

After taking a 20-year hiatus from running, Randi began running again in her 40s after a friend convinced her to join Orangetheory, she told the Ali on the Run Show podcast in November 2023.

From there, she gained the confidence to complete her first 10k. Since January 2023, she’s run in 12 marathons and eight ultramarathons, which are anywhere from 50 to 100 miles.

“I am so grateful for the professional experiences that I’ve had and so grateful for the incredible men in my life. But I feel like I’ve been the supporting character in my own life,” she said on the audio show. “The moment I got to break the tape at the half marathon was the first moment in my entire life where I felt like the main character.”

Having completed her first 100-mile challenge in August 2024, Randi is currently training for the Cocodona 250 — a five-day, 250-mile race held in Arizona in May 2025.

“All my life, I’ve been surrounded by people chasing the wrong things — money and power — and it took me training for a marathon to realize that the biggest flex in life is health and community,” she told the blog So Busy, So Healthy in June 2024. “I feel richer in my life right now than I have ever felt.”

Arielle is a part-time DJ

Outside of her career in venture capital, Arielle is also a part-time DJ who goes by “AZ.”

Arielle DJs solo and as one-half of the Bay Area-based duo Ellen Ride, along with Raed Khawaja. With Ellen Ride, Arielle has spun at Burning Man in 2018 and 2019, according to their SoundCloud. She later performed at the event solo in 2022.

The investor/DJ hasn’t just performed at Burning Man — she also helped create a conference called Learning Man in 2023. The tech conference focused on “immersing attendees in education, play and creation,” and each attendee was encouraged to teach a class on a topic they cared about, according to TechCrunch.

Arielle led a session on DJing, while other subjects included sewing, cooking and woodworking, The Washington Post reported. “Even tech workers are not just passionate about tech,” she told the outlet.

Randi has performed in and produced shows on Broadway

Randi has had a passion for theater and performing since she was a child, and in adulthood, she has taken that enthusiasm to Broadway.

“I always loved theater and music … it was my life passion,” she told The Human Code. “I did theater my entire childhood, up until I got rejected from music major at college.”

Though she did not get the chance to pursue music at Harvard, she was granted the opportunity to perform on Broadway in March 2014, playing the role of Regina in the Tony-nominated musical Rock of Ages, according to Playbill.

“It’s been a lifelong dream for me to perform on Broadway,” she told the outlet. “I thought I needed to shelve those dreams for my career, but this experience has taught me that there are multiple paths to achieving our dreams and that the modern woman can be well-rounded.”

Following her two-week stint in Rock of Ages, Randi took a turn behind the curtain, producing shows on Broadway such as Oklahoma!, Hadestown and The Inheritance — winning a Tony Award for each. Her most recent Broadway venture was producing 2024’s Shucked, which was also nominated for multiple Tony Awards.