Celebrity Siblings: 10 Not Famous Brothers and Sisters You Never Knew About

(Associated Press)

Nowadays you can't turn a corner without seeing Miley Cyrus' name, you might not know the star has a 25-year-old sister named Brandi, not to mention two brothers and a younger sister. Like Miley and their 24-year-old rocker brother Trace, Brandi is following in father Billy Ray's footsteps by singing in pop duo Frank + Derol. Unsurprisingly, even 13 -year-old Noah Cyrus has taken to YouTube to showcase her vocal talents. And while Miley can be seen modeling couture look for Harper's Bazaar's September issue, Brandi recently posed for Rad + Refined, an online boutique selling youthful labels like Mara Hoffman, House of Harlow and and Wildfox Couture. In case you need more proof that good looks run in the family, last year their 18-year-old brother Braison, was signed my Wilhelmina Models. (Associated Press)

Robert Pattinson isn't the only one in the family that's genetically blessed, the 'Twilight' heartthrob has two gorgeous sisters: 25-year-old Lizzy and 27-year-old Victoria. Lizzy is a member of the punk band Aurora, while Victoria works in advertising. The sisters made headlines at the start of the year by reportedly being the reason why Robert Pattinson and Kristen Stewart spent last Christmas apart. Unlike their brother, the sisters allegedly couldn't forgive K-Stew for publicly humiliating Rob by cheating on him with Rupert Sanders, and urged him to forget her for good (Associated Press)

As the youngest of five children, Blake Lively was born into a show business family (her older sister Robyn starred in the 1989 cult classic "Teen Witch"), but her it was her older brother Eric Kopeloff who encouraged her to audition for roles when she was 15 and to pursue an acting career versus going to college. Clearly he has faith in his sis because in 2012 he produced the film "Savages" featuring Lively. Other successful titles Kopeloff's produced include 'Wall Street: Money Never Sleeps' and 'W.' (Reuters)

Doug Pitt not only shares his older brother Brad's face, but the 47-year-old is also a big time philanthropist who's been honored by Bill Clinton and acts as a Goodwill Ambassador For The United Republic of Tanzania. When he's not saving the world, Doug runs his own business called ServiceWorld Computer Center and spends time with his wife and their three teenage children. (Associated Press)

Penelope Cruz, 39, and her lookalike sister Monica, 36, are a fierce fashion pair if we've ever seen one. The two have posed for and designed a line for Mango, they're working on a handbag for Loewe, and earlier this month they announced a five-year partnership with the high-end British lingerie label Agent Provocateur. (Associated Press)