Nick Harvey / REX / Shutterstock / Rex USA 1 / 50
Nick Harvey / REX / Shutterstock / Rex USA 1 / 50

Liv Tyler was the byproduct of an eight-month love affair between Aerosmith's Steven Tyler and '70s Playboy centerfold Bebe Buell. Unfortunately when she was born, Tyler was more interested in partying than parenting so Buell's then-partner Todd Rundgren assumed the position. In 1986, Tyler met her real dad at her substitute dad's show and felt an unexplained connection, but wouldn't put the pieces together until she met her splitting-image half-sister Mia at a 1988 Aerosmih show. Model Paulina Porizkova accidentally launched her modeling career when photos she took of the big-lipped beauty ended up in a '91 Interview Magazine. In 1994, the senior Tyler helped launch the Seventeen cover girl's acting career by putting her in the racy music video for "Crazy" alongside it girl Alicia Silverstone. She made her movie debut, in which she made out with the much older Richard Dreyfuss, in Silent Fall the same year. The two projects led to a series of coming-of-age indies like Stealing Beauty and Inventing the Abbotts (where she met her live-in boyfriend Joaquin Phoenix), two Robert Altman films, the 2008 screamfest The Strangers, and blockbusters like Armageddon, The Incredible Hulk and the Lord of the Rings trilogy as well as a 2003 stint as the face of Givenchy. She made like her mother and fell head over heels for a rock star in 1998, Spacehog's Royston Langdon, whom she married in 2003. They had son Milo the following year but ultimately broke up in 2008.