Popsugar Celebrity And Entertainment Zac Efron Celebrities With Their Siblings | Pictures Celebrity Siblings You Probably Didn't Know About 28 January, 2016 by Britt Stephens 4 Shares View On One Page Photo 11 of 86 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 11 Katy Perry and David Hudson Katy Perry's brother David Hudson is also a musician, and he walked the red carpet with his famous family member at the Grammys in 2014. Previous Next Start Slideshow Zac EfronEmma WatsonNicole RichieGwyneth Paltrow