Los Angeles - Katie Holmes had to learn how to shoot a gun for Miss Meadows.
The 35-year-old actress really enjoyed playing the titular character in her latest movie - which tells the story of a teacher who moonlights as a vigilante - partly because she got to handle a powerful weapon.
She said: Miss Meadows is a new character for me because she's kind of funny - a substitute teacher who turns into a vigilante when she sees a child being harmed.
Take a peek at Holmes kicking ass in this trailer:
"She was fun to play - plus, I learned how to shoot a gun."
Katie - who has eight-year-old daughter Suri Cruise with ex-husband Tom Cruise - admits she is pleased to be back on the big screen after a few years off, and is "excited" about what other acting roles she might be offered in the future.
She added to HELLO! magazine: "Work ebbs and flows but I have been fortunate recently to have more projects come my way.
"And because my child is growing up, I have a bit more time to focus on my work - and I'm excited about it."