Liv Tyler

A 1988 Aerosmith concert changed Liv Rundgren's world forever: It was there she learned that the band's Steven Tyler (those lips!) was her biological father.

In the 1990s, Liv Tyler put her ga-ga gorgeous looks – and new surname – to good use, landing on the cover of Seventeen at age 15. But her breakout role can be credited to her father, Steven. In the 1994 Aerosmith music video, "Crazy," she played a schoolgirl who ditches class to hang out at a strip club with Alicia Silverstone. The video turned her into a rock sex symbol and led to roles in such movies as the tender coming-of-age film Stealing Beauty, blockbusters like Armageddon and the record-breaking Lord of the Rings trilogy.

Tyler, who married British musician Royston Langdon in 2003, had son Milo the following year. In 2008, the actress separated from Langdon before shattering the box office with The Incredible Hulk.