Channing TatumZac EfronEvan Peters
It's Zac Efron's younger brother Dylan.
Kristen StewartEmma StoneEmma Watson
This is Alex Watson, Emma Watson's younger brother.
Lupita Nyong'oIdris ElbaUzo Aduba
It's Lupita Nyong'o's brother Peter.
Chloë Grace MortezMargot RobbieScarlett Johansson
This is Chloë Grace Moretz's brother Trevor.
Ben AffleckJohn KrasinskiPaul Rudd
This is Paul Krasinski, John Krasinski's brother.
Jessica AlbaMila KunisJesse Williams
This is Joshua Alba, whose sister is Jessica Alba.
Cara DelevingneGigi HadidKarlie Kloss
It's Gigi (and Bella) Hadid's younger brother Anwar.
Chris EvansChris PineChris Pratt
This is Chris Evans' brother Scott.
Chris MartinGwyneth PaltrowJennifer Garner
He's Gwyneth Paltrow's brother Jake.
Alicia KeysFrank OceanRihanna
He's Rorrey Fenty, Rihanna's brother.
Who Are These People's Famous Siblings?
You definitely don't know celebrity siblings very well.
To be fair, some of them weren't all that easy.
Spotting celebrity relatives seems to be your gift. Own it.