The Hunger Games star had stopped to chat with fans and take pictures outside Late Show With David Letterman in New York when the metal railing gave way.
According to reports. J-Law's bodyguards rushed to make sure she was okay before bundling her away from the crowds for fears over her safety.
We're happy to report Jen is just fine!
The Oscar winner has been on the publicity trail lately for the third movie in the Hunger Games franchise, Mockingjay – Part One.
She returns as Katniss Everdeen alongside co-stars Liam Hemsworth (Gale) and Josh Hutcherson (Peeta).
The last time we saw Katniss in Catching Fire, she'd just been airlifted out of her second Hunger Games Arena and faced with the shocking news that her District 12 has been destroyed.
Hunger Games: Mockingjay - Part One is released 20 November.
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