Halle Berry just stepped into the gym with the most dangerous woman alive -- UFC star Cris Cyborg!
The two hooked up at Cyborg's gym in Huntington Beach, CA on Thursday for a training session -- and anyone who's ever worked out with Cris before knows she don't mess around!
So, why are they training together? Halle is starring in "John Wick 3" and she's been doing heavy MMA training for the role ... so it's possible she was working with Cris to prep for a fight scene.
Or maybe she just caught the MMA bug after all of the Brazilian Jiu Jitsu work she's been putting in for the movie role.