From the sexy Simpson sisters to the hunky Hemsworth brothers, Hollywood is teeming with gorgeous celebrity siblings.
It begs the question: which star shines brighter? Is Kate Mara more desirable than her little sister Rooney? Does Drew Lachey have an edge over his older brother Nick?
Though most celebrity families appear to be tight-knit, that doesn't mean there isn't a "healthy competition" between most siblings. Case in point: Kate and Pippa Middleton.
PHOTOS: WHO'S THE HOTTER STAR SIBLING?
"Certainly when it comes to looks, like who is the slimmest or better looking, there is a little friendly rivalry," royal watcher Katie Nicholl told Us Weekly in 2011.
Other famous celebrity siblings include Beyonce and Solange Knowles; Owen and Luke Wilson; Emily and Zooey Deschanel; Nick and Joe Jonas; and Paris and Nicky Hilton.
Who do you think is the hotter star sibling? Check out Us Weekly's gallery and cast your vote now.
Get more Us! Follow us on Twitter, Friend us on Facebook, Subscribe to Us Weekly
Check out Hilary's Frenchie plus more of the cutest celebri-pups to make their debut on social media in 2014 on today's Celebs Gone Social.
From Miley Cyrus and Patrick Schwarzenegger to Kris Jenner and Corey Gamble; check out these odd celebrity couples.
Check out The Rock's best Instagram videos of 2014 on today's Celebs Gone Social, hosted by Wonderwall Editor Jessica Wedemeyer.
From Brad and Angelina to George and Amal, get the scoop on Hollywood's two biggest weddings of the year.
From Johnny and Amber to Donnie and Jenny, see more star couples who got engaged in 2014.
Wonderwall chats with Christina Aguilera, the Backstreet Boys, Psy, and more of music's biggest stars at the AMAs.
© 2014 Whalerock Industries