By Claire Stern
Updated Apr 10, 2015 @ 8:27 am
James Franco, Dave Franco, and the Olsens, National Siblings Day
Credit: Alberto E. Rodriguez/WireImage; Jamie McCarthy/WireImage

It's National Sibling Day (yes, there's a day for that!) and in honor of the occasion, we're celebrating celebs and their famous families (hello, Beyoncé and Solange).

With the youngest of the set often following in the eldest's footsteps (we're talking to you, Olsen twins!), we often see siblings tagging along for star-studded red carpet outings—and making a name for themselves along the way. We’ve rounded up nine of our favorite famous sibs, from the Franco boys to the Knowles ladies and the Olsen sisters: