Actor Liv Tyler thought Todd Rundgren was her biological father for 11 years. Then, she discovered Aerosmith singer Steven Tyler is her real dad at a concert.

Liv Tyler was a guest on Kate and Oliver Hudson 's Sibling Revelry podcast with her sister, Mia, where she recalled learning for the first time that Aerosmith front man, Steven Tyler, is her dad.

Liv Tyler is opening up about her complicated family dynamics. The actress, 47, reflected on how her stepdad, Todd Rundgren, was impacted by discovering her biological father was Steven Tyler.

File Photo: Steven Tyler and Liv Tyler are seen at “Steven Tyler: Out on a Limb” Lincoln Center on May 2, 2016 in New York. Originally appeared on E! Online.

I was literally like looking in the mirror, seeing double.” After the song dedication, Liv’s mom told her that Steven, 77, was her real father. “I looked at my mom, and she just started crying.

That other girl was Mia Tyler, Steven’s daughter with Cyrinda Foxe, who was born a year after Liv. “I looked at my mom and she just started crying,” said Liv. “My mom just, like, bawled.

Originally appeared on E! Online. Liv Tyler's emotions didn’t miss a thing after finding out that her dad is Steven Tyler. Stream NBC 5 for free, 24/7, wherever you are. The "Lord of the Rings ...