Okay, so maybe this isn't quite as revealing as the Jennifer Lawrence bikini photos, but it's close.
Lawrence's extremely form-fitting Mystique get-up is highlighted in a new set photo tweeted by Bryan Singer. Take a look:
Lawrence returns for the new film along with fellow First Class cast members James McAvoy, Michael Fassbender, and Nicholas Hoult.
Days of Future Past combines the timeline from the prequel with that of the original trilogy, with Patrick Stewart, Ian McKellen, Hugh Jackman, Ellen Page and Halle Berry also starring.