Natalie Portman plays a young orphan taken in by hit man Léon in The Professional (1994). She becomes an apprentice assassin.
Kills: 26 (assists)
In Let the Right One In (2008), Eli (Lina Leandersson) is a vampire who must kill to survive–or for fun, if schoolyard friends are in need.
As wannabe superhero Hit-Girl in Kick-Ass (2010), Chloë Grace Moretz won’t act her age, dropping foul language as well as bodies.
An ex–CIA operative trains his daughter (Saoirse Ronan) to hunt the most dangerous game. Hanna (2011) maims more than murders, but still …
This appears in the March 13, 2017 issue of TIME.