Happy National Sibling Day! Have you hugged your sister or brother yet today? Have you sent them a text message, telling them you love them? Most importantly, have you uploaded a super cute throwback pic of you and your sis or bro to Instagram, with a heartfelt message as the caption? If the answer is "no," then go to Instagram right now and then come back to this page. If the answer is "yes," you may keep reading... ;)
Your favorite stars' siblings have grown up since you last saw them and some of them even have their own acting careers. But today is about the relationship between siblings — the incomparable bond that two sibs share — which is why M compiled some of the cutest pics of your fave celebrities and their brothers and sisters.
Click through the gallery to see pics of some of the cutest celeb siblings we've ever seen!