Liv’s mother is of English, and small amounts of Scottish, Irish, Welsh, and German, ancestry. Liv’s father is of one quarter Italian, one quarter German, and one quarter Polish, descent, and also has English, and distant Welsh, ancestry; on the show Who Do You Think You Are? (2017), Liv discovered that her great-great-great-great-grandfather, Robert J. Elliott, was of half or part African-American ancestry.
Liv Tyler was born on July 1, 1977, in New York City, New York, the United States. Tyler is the only daughter of Steven Tyler (lead singer of Aerosmith) and Bebe Buell (singer and model). Her mother, former Ford Model and Playboy Playmate Bebe Buell had an eight-month affair with Tyler that resulted in Liv. Her mother named her after Norwegian actress Liv Ullmann, after seeing Ullmann on the cover of the March 5, 1977 issue of TV Guide.
Her mother Bebe Buell and her mom's life-partner Todd Rundgren raised her as parents. Tyler was originally fooled to believe that Todd Rundgren was her father, and it wasn’t until she was at an Aerosmith gig that she found out that, in fact, Steven Tyler was her real dad. When Tyler was 12, she changed her surname to Tyler. To this day, Todd Rundgren is her spiritual father. Shortly after Tyler was born, her mum broke up with Rundgren and moved up with Tyler to Portland, Maine. But Tyler maintains a close relationship with Rundgren: "I'm so grateful to him, I have so much love for him. You know, when he holds me it feels like Daddy. And he's very protective and strong."
In her childhood, Liv was living discursively with her mom, her aunt Annie at Maine, and her grandmother Dorothea Johnson at Virginia. Already as a little girl, she loved to perform - dress up in her mother's clothes and makeup and put on a show in front of her mother's friends.
Tyler has three half-siblings: Mia Tyler (born 1978), Chelsea Anna Tallarico (born 1989), and Taj Monroe Tallarico (born 1991).
When asked about her youth, Tyler said: "For me, I didn't get much of a childhood in my teen years because I've been working since I was 14. But that also kept me out of trouble. When everybody was doing acid and partying like crazy, I was at work on a movie in Tuscany ... having my own fun, of course, but it was a different kind of thing. I have no regrets. I love the way my life has gone."