The actress confirmed that she will not reprise her role as Emma Frost in Bryan Singer's upcoming film.
"I haven't been asked back," she told Collider. "It's called Days of Future Past or something.
"No, they're going into another time period, or they're going back and forth from different time periods and Emma's not in that. Not in what they're doing."
The film will see the return of Jones's fellow X-Men: First Class cast members James McAvoy, Jennifer Lawrence, Nicholas Hoult and Michael Fassbender.
Sir Patrick Stewart, Sir Ian McKellen, Anna Paquin, Ellen Page, Shawn Ashmore, Hugh Jackman, Halle Berry and Daniel Cudmore will also reprise their roles from early instalments of the 20th Century Fox franchise.
Jones will shortly return on the small screen in the role of Betty Draper in Mad Men season six.
X-Men: Days of Future Past will arrive in cinemas on July 18, 2014.
Watch Bryan Singer and James McAvoy discuss X-Men: Days of Future Past with Digital Spy below: