Talk about sibling rivalry!

Picture this — you're a gorgeous human being, but your brother or sister is hogging all of the spotlight in Hollywood. How would you feel not getting the recognition you deserve for your awesomeness?

That's pretty much real life for these hot celebrity siblings — which is why today, we're paying tribute to THEM.

Can you figure out who's related to Blake Lively, Emma Watson and these five other stars? Let's find out!