Sydney Sweeney Claps Back at Trolls Commenting on Body with Workout Video

Sydney Sweeney‘s ready to knock out all the haters talking trash from behind a keyboard … sharing a clip with all their negative comments about her body — cut together with a powerful workout montage.

Here’s the deal … the actress — who plays boxing legend Christy Martin in an upcoming biopic — has been slammed by internet trolls in recent days saying she’s gained too much weight and isn’t hot enough for them anymore.

Sweeney put many of the body-shamers on blast though by cutting their comment into a video … flashing through each of them quickly — before cutting to a clip of the star getting swole.

Check out the clip … she’s flipping tires, sparring in the ring, hitting the speed bag doing squats, crunches — the whole circuit in the gym really.

She’s flexing in the clip too — and, we gotta say she’s looking jacked … putting on some weight that’s all clearly pure muscle.

We’ve shown you some shots of Sydney on set in the past few months … and, she’s totally transformed herself to embody Martin — looking exactly like the boxing standout.

She’s been spotted on set in baggy red and baggy pink tops with sweatpants … and brown wigs covering up her light blonde hair.