No, they are not.
Kimberly Stewart has one full brother, Sean Stewart. She also has four younger half siblings from her father Rod Stewart: Ruby (whose mother is Kelly Emberg); Renee and Liam (whose mother is Rachel Hunter); and Alistair (whose mother is Penny Lancaster).
Kristen Stewart has an older brother, Cameron Stewart.
They are a lot of "Stewart"s in this world. Just because two people's last name is the same, don't expect them to be related. Unless you know they are, of course.
Like example,
let's say a girl's name's Felicia. And another girl's name is Penny. They look a like alot. They talk a like alot. Their style of fashion is nearly the same and their last name is Lanne. But that doesn't really mean their related.
=) Hope I helped!yes
Kristen Stewart does not have any sisters.
Kristen Stewart has an older brother, Cameron Stewart.
no sister
No, she is an only child
No his sisters are Maegan, Fivel, and Sage.
2 brothers
No, She had three brothers. Cameron, Dana, and Taylor.
1 brother name Cameron
Yes, Kristen Stewart is physically and biologically female.
Kristen Stewart's real name is Kristen Jaymes Stewart.
Kristen Stewart's real name is Kristen Jaymes Stewart.