You probably know Liv Tyler as the ethereal Arwen from The Lord of the Rings or the face of countless high-fashion campaigns. But for the first decade of her life, she didn't even know who her biological father was. It sounds like the plot of a soapy prestige drama, but it was just Tuesday in the 1970s rock scene.
Basically, for a long time, the world—and Liv herself—believed her father was Todd Rundgren. Todd is a legend in his own right, the wizard behind "Hello It's Me" and a producer for everyone from Meat Loaf to the New York Dolls. He was the one who signed the birth certificate. He was the one who paid for her private school.
Then came the moment that changed everything at an Aerosmith concert.
The Mystery of Steven Tyler: More Than Just a Resemblance
Liv Tyler was born Liv Rundgren in 1977. Her mother, Bebe Buell, was a famous model and singer who lived a life most of us only read about in memoirs. At the time, Bebe was in a long-term, somewhat open relationship with Todd Rundgren. However, a brief fling with Steven Tyler, the flamboyant frontman of Aerosmith, resulted in a pregnancy.
Bebe made a choice. Honestly, it was a choice made out of protection.
In the late '70s, Steven Tyler was spiraling. He was deeply entrenched in a heavy drug addiction that would eventually lead to the nickname "The Toxic Twins" for him and guitarist Joe Perry. Bebe didn't think he was in any state to be a father. She and Todd made a pact: Todd would be her father. He stepped up, fully knowing the child might not be his, and raised her as his own.
Fast forward to 1988.
Liv is around 10 or 11 years old. She’s at an Aerosmith show, and she sees Steven’s other daughter, Mia Tyler. It was like looking into a mirror. The resemblance was so uncanny it was spooky.
She looked at her mom and asked the question. Bebe couldn't lie anymore; she burst into tears. That was the moment Liv realized that the rock star on her bedroom posters wasn't just a celebrity she liked—he was her dad.
Two Dads, One Family
Most people would expect some kind of massive falling out here. Surprisingly, that's not what happened. While it was definitely messy—and Liv has admitted in recent interviews, like her 2025 appearance on the Sibling Revelry podcast, that it’s still a "hard and painful" subject for Todd—the family somehow made it work.
Liv didn't just ditch Todd. She kept "Rundgren" as her middle name when she officially changed her last name to Tyler in 1991. She calls Todd her "spiritual father."
It’s a unique dynamic. You’ve got:
- Todd Rundgren: The stable, supportive force who chose to be a dad when he didn't have to.
- Steven Tyler: The biological father who eventually got sober and built a real, "magical wizard" relationship with her.
Steven has since been an incredibly present part of her life. He was even in the delivery room when her son Sailor was born in 2015, famously cutting the umbilical cord. Imagine having the lead singer of Aerosmith doing that. Wild.
Why the Father of Liv Tyler Story Still Matters Today
In the age of DNA tests like 23andMe, secrets like this are getting harder to keep. But the Tyler/Rundgren saga is a reminder that fatherhood isn't always about biology.
Todd Rundgren’s decision to stay in Liv’s life even after the truth came out is arguably one of the most "rock star" moves in history. It wasn't about ego; it was about the kid.
Today, Steven Tyler is retired from the road. After a vocal injury in 2023 that ended Aerosmith’s touring career, he’s been leaning into the "grandpa" role. Liv describes him as someone who makes weird animal noises and wears jewelry in his hair—a far cry from the drug-fueled chaos of the '70s that kept them apart in the first place.
What You Can Take Away From This
If you're looking into this story because of your own complicated family tree, there are a few real-world insights to glean from how they handled it:
- Honesty eventually wins: Secrets have a way of coming out, usually through "DNA and genes," as Liv puts it. Addressing the truth, even late, allows for healing.
- Family is a choice: You don't have to choose one "dad" over the other. Liv embraces both, acknowledging that one gave her life and the other gave her a foundation.
- Compassion for the past: Liv has spoken about how she eventually understood her mother’s perspective. Being a 23-year-old mom in NYC in the '70s was a different world.
If you're dealing with a similar discovery, the best path forward is often the one Liv took: professional therapy to process the "layers" of shock, followed by an open heart toward everyone involved.
For those interested in the more technical side of this history, researching Bebe Buell's memoir Rebel Heart or watching early Aerosmith documentaries provides the gritty context of the era that made this secret feel necessary at the time.
Next Steps: To understand the full scope of this family's history, look into Todd Rundgren’s 2025 comments on his relationship with Liv, or check out Mia Tyler’s photography which often captures their "wolf pack" family dynamic in its rawest form.