It's National Siblings Day! Let's look at eight set of sisters that have made their mark in the entertainment world.

Whether they're your friend or someone you only acknowledge in the break room, we've got you covered with these birthday ...

Kourtney Kardashian Barker had some nice things to say about her sister Kim Kardashian in honor of her 44th birthday on the season 6 finale of 'The Kardashians' as she praised her younger sister who ...