Hallie Kate Eisenberg
Famous sibling: Jesse Eisenberg
"The Social Network" star's little sister is something special, actually. Remember those late-'90s Pepsi commercials with the dimple-faced girl who kindly squeaked, "I'll have a Pepsi, please"? That's this girl! She last appeared in her big brother's film "Holy Rollers," which was released in 2010. —XFINITY Entertainment Staff (Photo by Andrew H. Walker/Getty Images)
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