An actress who plays a post-apocalyptic juvenile delinquent on TV allegedly went nuclear on her BF in real life and got busted by cops.
Law enforcement sources tell TMZ ... Marie Avgeropoulos -- who stars as Octavia Blake on CW's hit sci-fi show, "The 100" -- was arrested in L.A. last week and booked for felony domestic violence.
Man - August - Car - Girlfriend - Argument
We're told a man called police very early on August 5 from inside a car ... claiming his girlfriend had hit him during a verbal argument. Sources say when police arrived, the man had marks on his body ... so Marie was taken to jail.
Her mugshot's just as edgy as her character on '100' -- albeit...