Jennifer Lawrence in body suit for X-Men sneak peak

X-MEN: Days of Future Past director Bryan Singer has tweeted a sneak peak of one of the movie's biggest stars in costume.

Singer's photo shows Oscar-winner Jennifer Lawrence dressed in a blue body suit for her role as the mutant Mystique.

He earlier tweeted a photo of Game of Thrones star Peter Dinklage preparing for his as-yet unknown part in the movie.

Singer directed the first two X-Men films and produced the recent prequel X-Men: First Class.

X-Men: Days of Future Past will unite the First Class cast with original X-Men cast members Patrick Stewart, Hugh Jackman and Ian McKellen.

The director previously said he would use the movie's time travel-based storyline to "correct a few things" from previous movies.

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