Amanda Seyfried might have felt ‘Les Misérables’ when she accidentally exposed herself to Glen Powell … though she does admit the actor was a total gentleman about it.

The actress told the story in an interview with People to promote her new Peacock show “Long Bright River” … explaining that when she was at the 2023 Critics Choice Awards, she wore a flimsy vintage Dior Haute Couture gown.

Check out the pics … the ensemble has a plunging neckline, and a sheer material that’s covering her breasts — which Amanda says didn’t hold up for the whole night.

Amanda explains later in the evening she and Glen were seated at the same table … and, when she raised her arms to tell a joke, the dress slipped down — revealing every bit of her bosom to the star.

Instead of gawking or making a creepy comment, Seyfried says Powell acted like a true gentleman … moving to cover her up and not even taking a peek — at least, Seyfried says she doesn’t think he caught a glimpse of her goods.

Seyfried won Best Actress in a Limited Series or Movie Made For Television for her role as Elizabeth Holmes in “The Dropout” BTW … and, she borrowed a friend’s jacket to cover up her boobs since the dress couldn’t do the job.